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Finding the Fourth Proportional to 900,000.80, 1,350,001.20 and 520,920.80

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Solution

The fourth proportional to 900,000.80, 1,350,001.20 and 520,920.80 is: 781,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,000.80 : 1,350,001.20 = 520,920.80 : x
  2. Step 2: Convert to fraction form
    900,000.80/1,350,001.20 = 520,920.80/x
  3. Step 3: Cross multiply
    900,000.80x = 1,350,001.20 × 520,920.80
  4. Step 4: Simplify right side
    900,000.80x = 703,243,705,104.96
  5. Step 5: Solve for x
    x = 703,243,705,104.96/900,000.80
  6. Step 6: Final answer
    x = 781,381.20

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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.