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Finding the Fourth Proportional to 713,838.96, 985,089.96 and 391,547.88

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Solution

The fourth proportional to 713,838.96, 985,089.96 and 391,547.88 is: 540,331.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,838.96 : 985,089.96 = 391,547.88 : x
  2. Step 2: Convert to fraction form
    713,838.96/985,089.96 = 391,547.88/x
  3. Step 3: Cross multiply
    713,838.96x = 985,089.96 × 391,547.88
  4. Step 4: Simplify right side
    713,838.96x = 385,709,885,447.29
  5. Step 5: Solve for x
    x = 385,709,885,447.29/713,838.96
  6. Step 6: Final answer
    x = 540,331.79

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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.