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Finding the Fourth Proportional to 644,807.80, 967,211.70 and 445,742.20

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Solution

The fourth proportional to 644,807.80, 967,211.70 and 445,742.20 is: 668,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,807.80 : 967,211.70 = 445,742.20 : x
  2. Step 2: Convert to fraction form
    644,807.80/967,211.70 = 445,742.20/x
  3. Step 3: Cross multiply
    644,807.80x = 967,211.70 × 445,742.20
  4. Step 4: Simplify right side
    644,807.80x = 431,127,071,023.74
  5. Step 5: Solve for x
    x = 431,127,071,023.74/644,807.80
  6. Step 6: Final answer
    x = 668,613.30

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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.