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Finding the Fourth Proportional to 371,547.95, 557,320.90 and 105,310.78

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Solution

The fourth proportional to 371,547.95, 557,320.90 and 105,310.78 is: 157,965.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,547.95 : 557,320.90 = 105,310.78 : x
  2. Step 2: Convert to fraction form
    371,547.95/557,320.90 = 105,310.78/x
  3. Step 3: Cross multiply
    371,547.95x = 557,320.90 × 105,310.78
  4. Step 4: Simplify right side
    371,547.95x = 58,691,895,376.14
  5. Step 5: Solve for x
    x = 58,691,895,376.14/371,547.95
  6. Step 6: Final answer
    x = 157,965.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.