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Finding the Fourth Proportional to 564,792.20, 779,418.65 and 310,148.72

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Solution

The fourth proportional to 564,792.20, 779,418.65 and 310,148.72 is: 428,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,792.20 : 779,418.65 = 310,148.72 : x
  2. Step 2: Convert to fraction form
    564,792.20/779,418.65 = 310,148.72/x
  3. Step 3: Cross multiply
    564,792.20x = 779,418.65 × 310,148.72
  4. Step 4: Simplify right side
    564,792.20x = 241,735,696,641.63
  5. Step 5: Solve for x
    x = 241,735,696,641.63/564,792.20
  6. Step 6: Final answer
    x = 428,008.21

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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.