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Finding the Fourth Proportional to 539,869.78, 745,020.30 and 313,529.86

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Solution

The fourth proportional to 539,869.78, 745,020.30 and 313,529.86 is: 432,671.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,869.78 : 745,020.30 = 313,529.86 : x
  2. Step 2: Convert to fraction form
    539,869.78/745,020.30 = 313,529.86/x
  3. Step 3: Cross multiply
    539,869.78x = 745,020.30 × 313,529.86
  4. Step 4: Simplify right side
    539,869.78x = 233,586,112,463.17
  5. Step 5: Solve for x
    x = 233,586,112,463.17/539,869.78
  6. Step 6: Final answer
    x = 432,671.21

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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.