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Finding the Fourth Proportional to 644,090.40, 966,135.60 and 406,663.20

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Solution

The fourth proportional to 644,090.40, 966,135.60 and 406,663.20 is: 609,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,090.40 : 966,135.60 = 406,663.20 : x
  2. Step 2: Convert to fraction form
    644,090.40/966,135.60 = 406,663.20/x
  3. Step 3: Cross multiply
    644,090.40x = 966,135.60 × 406,663.20
  4. Step 4: Simplify right side
    644,090.40x = 392,891,794,729.92
  5. Step 5: Solve for x
    x = 392,891,794,729.92/644,090.40
  6. Step 6: Final answer
    x = 609,994.80

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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.