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Finding the Fourth Proportional to 644,665.80, 966,998.70 and 549,280.20

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Solution

The fourth proportional to 644,665.80, 966,998.70 and 549,280.20 is: 823,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,665.80 : 966,998.70 = 549,280.20 : x
  2. Step 2: Convert to fraction form
    644,665.80/966,998.70 = 549,280.20/x
  3. Step 3: Cross multiply
    644,665.80x = 966,998.70 × 549,280.20
  4. Step 4: Simplify right side
    644,665.80x = 531,153,239,335.74
  5. Step 5: Solve for x
    x = 531,153,239,335.74/644,665.80
  6. Step 6: Final answer
    x = 823,920.30

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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.