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Finding the Fourth Proportional to 527,221.70, 790,832.55 and 386,216.90

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Solution

The fourth proportional to 527,221.70, 790,832.55 and 386,216.90 is: 579,325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,221.70 : 790,832.55 = 386,216.90 : x
  2. Step 2: Convert to fraction form
    527,221.70/790,832.55 = 386,216.90/x
  3. Step 3: Cross multiply
    527,221.70x = 790,832.55 × 386,216.90
  4. Step 4: Simplify right side
    527,221.70x = 305,432,895,880.10
  5. Step 5: Solve for x
    x = 305,432,895,880.10/527,221.70
  6. Step 6: Final answer
    x = 579,325.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.