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Finding the Fourth Proportional to 678,958.40, 936,572.82 and 423,866.72

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Solution

The fourth proportional to 678,958.40, 936,572.82 and 423,866.72 is: 584,692.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,958.40 : 936,572.82 = 423,866.72 : x
  2. Step 2: Convert to fraction form
    678,958.40/936,572.82 = 423,866.72/x
  3. Step 3: Cross multiply
    678,958.40x = 936,572.82 × 423,866.72
  4. Step 4: Simplify right side
    678,958.40x = 396,982,049,254.55
  5. Step 5: Solve for x
    x = 396,982,049,254.55/678,958.40
  6. Step 6: Final answer
    x = 584,692.74

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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.