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Finding the Fourth Proportional to 713,547.45, 984,694.86 and 391,262.91

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Solution

The fourth proportional to 713,547.45, 984,694.86 and 391,262.91 is: 539,942.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,547.45 : 984,694.86 = 391,262.91 : x
  2. Step 2: Convert to fraction form
    713,547.45/984,694.86 = 391,262.91/x
  3. Step 3: Cross multiply
    713,547.45x = 984,694.86 × 391,262.91
  4. Step 4: Simplify right side
    713,547.45x = 385,274,576,385.64
  5. Step 5: Solve for x
    x = 385,274,576,385.64/713,547.45
  6. Step 6: Final answer
    x = 539,942.48

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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.