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Finding the Fourth Proportional to 720,061.61, 992,940.80 and 618,423.62

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Solution

The fourth proportional to 720,061.61, 992,940.80 and 618,423.62 is: 852,785.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,061.61 : 992,940.80 = 618,423.62 : x
  2. Step 2: Convert to fraction form
    720,061.61/992,940.80 = 618,423.62/x
  3. Step 3: Cross multiply
    720,061.61x = 992,940.80 × 618,423.62
  4. Step 4: Simplify right side
    720,061.61x = 614,058,035,924.87
  5. Step 5: Solve for x
    x = 614,058,035,924.87/720,061.61
  6. Step 6: Final answer
    x = 852,785.42

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1.5x scale

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.