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Finding the Fourth Proportional to 713,417.79, 984,516.32 and 391,120.97

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Solution

The fourth proportional to 713,417.79, 984,516.32 and 391,120.97 is: 539,746.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,417.79 : 984,516.32 = 391,120.97 : x
  2. Step 2: Convert to fraction form
    713,417.79/984,516.32 = 391,120.97/x
  3. Step 3: Cross multiply
    713,417.79x = 984,516.32 × 391,120.97
  4. Step 4: Simplify right side
    713,417.79x = 385,064,976,103.63
  5. Step 5: Solve for x
    x = 385,064,976,103.63/713,417.79
  6. Step 6: Final answer
    x = 539,746.81

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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.