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Finding the Fourth Proportional to 678,957.40, 936,571.44 and 423,865.72

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Solution

The fourth proportional to 678,957.40, 936,571.44 and 423,865.72 is: 584,691.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,957.40 : 936,571.44 = 423,865.72 : x
  2. Step 2: Convert to fraction form
    678,957.40/936,571.44 = 423,865.72/x
  3. Step 3: Cross multiply
    678,957.40x = 936,571.44 × 423,865.72
  4. Step 4: Simplify right side
    678,957.40x = 396,980,527,747.04
  5. Step 5: Solve for x
    x = 396,980,527,747.04/678,957.40
  6. Step 6: Final answer
    x = 584,691.36

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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.