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Finding the Fourth Proportional to 659,711.60, 910,403.76 and 357,905.60

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Solution

The fourth proportional to 659,711.60, 910,403.76 and 357,905.60 is: 493,910.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,711.60 : 910,403.76 = 357,905.60 : x
  2. Step 2: Convert to fraction form
    659,711.60/910,403.76 = 357,905.60/x
  3. Step 3: Cross multiply
    659,711.60x = 910,403.76 × 357,905.60
  4. Step 4: Simplify right side
    659,711.60x = 325,838,603,965.06
  5. Step 5: Solve for x
    x = 325,838,603,965.06/659,711.60
  6. Step 6: Final answer
    x = 493,910.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.