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Finding the Fourth Proportional to 672,427.40, 928,000.50 and 386,040.20

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Solution

The fourth proportional to 672,427.40, 928,000.50 and 386,040.20 is: 532,764.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,427.40 : 928,000.50 = 386,040.20 : x
  2. Step 2: Convert to fraction form
    672,427.40/928,000.50 = 386,040.20/x
  3. Step 3: Cross multiply
    672,427.40x = 928,000.50 × 386,040.20
  4. Step 4: Simplify right side
    672,427.40x = 358,245,498,620.10
  5. Step 5: Solve for x
    x = 358,245,498,620.10/672,427.40
  6. Step 6: Final answer
    x = 532,764.58

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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.