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Finding the Fourth Proportional to 458,800.20, 688,200.30 and 423,370.80

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Solution

The fourth proportional to 458,800.20, 688,200.30 and 423,370.80 is: 635,056.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,800.20 : 688,200.30 = 423,370.80 : x
  2. Step 2: Convert to fraction form
    458,800.20/688,200.30 = 423,370.80/x
  3. Step 3: Cross multiply
    458,800.20x = 688,200.30 × 423,370.80
  4. Step 4: Simplify right side
    458,800.20x = 291,363,911,571.24
  5. Step 5: Solve for x
    x = 291,363,911,571.24/458,800.20
  6. Step 6: Final answer
    x = 635,056.20

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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.