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Finding the Fourth Proportional to 801,000.80, 1,201,501.20 and 421,402.40

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Solution

The fourth proportional to 801,000.80, 1,201,501.20 and 421,402.40 is: 632,103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    801,000.80 : 1,201,501.20 = 421,402.40 : x
  2. Step 2: Convert to fraction form
    801,000.80/1,201,501.20 = 421,402.40/x
  3. Step 3: Cross multiply
    801,000.80x = 1,201,501.20 × 421,402.40
  4. Step 4: Simplify right side
    801,000.80x = 506,315,489,282.88
  5. Step 5: Solve for x
    x = 506,315,489,282.88/801,000.80
  6. Step 6: Final answer
    x = 632,103.60

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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.