Home / 458,821.40-688,232.10-143,310.20

Finding the Fourth Proportional to 458,821.40, 688,232.10 and 143,310.20

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Solution

The fourth proportional to 458,821.40, 688,232.10 and 143,310.20 is: 214,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,821.40 : 688,232.10 = 143,310.20 : x
  2. Step 2: Convert to fraction form
    458,821.40/688,232.10 = 143,310.20/x
  3. Step 3: Cross multiply
    458,821.40x = 688,232.10 × 143,310.20
  4. Step 4: Simplify right side
    458,821.40x = 98,630,679,897.42
  5. Step 5: Solve for x
    x = 98,630,679,897.42/458,821.40
  6. Step 6: Final answer
    x = 214,965.30

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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.