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Finding the Fourth Proportional to 630,589.80, 870,206.76 and 344,114.76

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Solution

The fourth proportional to 630,589.80, 870,206.76 and 344,114.76 is: 474,874.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,589.80 : 870,206.76 = 344,114.76 : x
  2. Step 2: Convert to fraction form
    630,589.80/870,206.76 = 344,114.76/x
  3. Step 3: Cross multiply
    630,589.80x = 870,206.76 × 344,114.76
  4. Step 4: Simplify right side
    630,589.80x = 299,450,990,367.78
  5. Step 5: Solve for x
    x = 299,450,990,367.78/630,589.80
  6. Step 6: Final answer
    x = 474,874.46

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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.