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Finding the Fourth Proportional to 658,343.80, 987,515.70 and 406,401.40

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Solution

The fourth proportional to 658,343.80, 987,515.70 and 406,401.40 is: 609,602.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,343.80 : 987,515.70 = 406,401.40 : x
  2. Step 2: Convert to fraction form
    658,343.80/987,515.70 = 406,401.40/x
  3. Step 3: Cross multiply
    658,343.80x = 987,515.70 × 406,401.40
  4. Step 4: Simplify right side
    658,343.80x = 401,327,763,001.98
  5. Step 5: Solve for x
    x = 401,327,763,001.98/658,343.80
  6. Step 6: Final answer
    x = 609,602.10

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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.