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Finding the Fourth Proportional to 678,304.75, 936,064.20 and 423,803.56

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Solution

The fourth proportional to 678,304.75, 936,064.20 and 423,803.56 is: 584,851.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,304.75 : 936,064.20 = 423,803.56 : x
  2. Step 2: Convert to fraction form
    678,304.75/936,064.20 = 423,803.56/x
  3. Step 3: Cross multiply
    678,304.75x = 936,064.20 × 423,803.56
  4. Step 4: Simplify right side
    678,304.75x = 396,707,340,348.55
  5. Step 5: Solve for x
    x = 396,707,340,348.55/678,304.75
  6. Step 6: Final answer
    x = 584,851.19

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Double scale
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Similar ratio
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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.