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Finding the Fourth Proportional to 713,637.53, 984,833.32 and 391,328.40

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Solution

The fourth proportional to 713,637.53, 984,833.32 and 391,328.40 is: 540,040.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,637.53 : 984,833.32 = 391,328.40 : x
  2. Step 2: Convert to fraction form
    713,637.53/984,833.32 = 391,328.40/x
  3. Step 3: Cross multiply
    713,637.53x = 984,833.32 × 391,328.40
  4. Step 4: Simplify right side
    713,637.53x = 385,393,247,382.29
  5. Step 5: Solve for x
    x = 385,393,247,382.29/713,637.53
  6. Step 6: Final answer
    x = 540,040.61

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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.