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Finding the Fourth Proportional to 439,485.60, 659,228.40 and 392,246.40

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Solution

The fourth proportional to 439,485.60, 659,228.40 and 392,246.40 is: 588,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,485.60 : 659,228.40 = 392,246.40 : x
  2. Step 2: Convert to fraction form
    439,485.60/659,228.40 = 392,246.40/x
  3. Step 3: Cross multiply
    439,485.60x = 659,228.40 × 392,246.40
  4. Step 4: Simplify right side
    439,485.60x = 258,579,966,677.76
  5. Step 5: Solve for x
    x = 258,579,966,677.76/439,485.60
  6. Step 6: Final answer
    x = 588,369.60

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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.