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Finding the Fourth Proportional to 713,430.60, 984,530.34 and 391,154.28

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Solution

The fourth proportional to 713,430.60, 984,530.34 and 391,154.28 is: 539,790.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,430.60 : 984,530.34 = 391,154.28 : x
  2. Step 2: Convert to fraction form
    713,430.60/984,530.34 = 391,154.28/x
  3. Step 3: Cross multiply
    713,430.60x = 984,530.34 × 391,154.28
  4. Step 4: Simplify right side
    713,430.60x = 385,103,256,280.86
  5. Step 5: Solve for x
    x = 385,103,256,280.86/713,430.60
  6. Step 6: Final answer
    x = 539,790.77

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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.