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Finding the Fourth Proportional to 713,414.79, 984,486.29 and 391,117.82

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Solution

The fourth proportional to 713,414.79, 984,486.29 and 391,117.82 is: 539,728.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,414.79 : 984,486.29 = 391,117.82 : x
  2. Step 2: Convert to fraction form
    713,414.79/984,486.29 = 391,117.82/x
  3. Step 3: Cross multiply
    713,414.79x = 984,486.29 × 391,117.82
  4. Step 4: Simplify right side
    713,414.79x = 385,050,124,686.67
  5. Step 5: Solve for x
    x = 385,050,124,686.67/713,414.79
  6. Step 6: Final answer
    x = 539,728.26

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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.