Home / 808,904.60-1,213,356.90-389,000.60

Finding the Fourth Proportional to 808,904.60, 1,213,356.90 and 389,000.60

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Solution

The fourth proportional to 808,904.60, 1,213,356.90 and 389,000.60 is: 583,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,904.60 : 1,213,356.90 = 389,000.60 : x
  2. Step 2: Convert to fraction form
    808,904.60/1,213,356.90 = 389,000.60/x
  3. Step 3: Cross multiply
    808,904.60x = 1,213,356.90 × 389,000.60
  4. Step 4: Simplify right side
    808,904.60x = 471,996,562,114.14
  5. Step 5: Solve for x
    x = 471,996,562,114.14/808,904.60
  6. Step 6: Final answer
    x = 583,500.90

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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.