Home / 788,909.40-1,184,141.70-390,000.60

Finding the Fourth Proportional to 788,909.40, 1,184,141.70 and 390,000.60

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Solution

The fourth proportional to 788,909.40, 1,184,141.70 and 390,000.60 is: 585,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,909.40 : 1,184,141.70 = 390,000.60 : x
  2. Step 2: Convert to fraction form
    788,909.40/1,184,141.70 = 390,000.60/x
  3. Step 3: Cross multiply
    788,909.40x = 1,184,141.70 × 390,000.60
  4. Step 4: Simplify right side
    788,909.40x = 461,815,973,485.02
  5. Step 5: Solve for x
    x = 461,815,973,485.02/788,909.40
  6. Step 6: Final answer
    x = 585,385.31

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.