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Finding the Fourth Proportional to 542,812.80, 814,219.20 and 402,844.80

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Solution

The fourth proportional to 542,812.80, 814,219.20 and 402,844.80 is: 604,267.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,812.80 : 814,219.20 = 402,844.80 : x
  2. Step 2: Convert to fraction form
    542,812.80/814,219.20 = 402,844.80/x
  3. Step 3: Cross multiply
    542,812.80x = 814,219.20 × 402,844.80
  4. Step 4: Simplify right side
    542,812.80x = 328,003,970,780.16
  5. Step 5: Solve for x
    x = 328,003,970,780.16/542,812.80
  6. Step 6: Final answer
    x = 604,267.20

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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.