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Finding the Fourth Proportional to 283,929.20, 425,893.80 and 84,280.40

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Solution

The fourth proportional to 283,929.20, 425,893.80 and 84,280.40 is: 126,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,929.20 : 425,893.80 = 84,280.40 : x
  2. Step 2: Convert to fraction form
    283,929.20/425,893.80 = 84,280.40/x
  3. Step 3: Cross multiply
    283,929.20x = 425,893.80 × 84,280.40
  4. Step 4: Simplify right side
    283,929.20x = 35,894,499,821.52
  5. Step 5: Solve for x
    x = 35,894,499,821.52/283,929.20
  6. Step 6: Final answer
    x = 126,420.60

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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.