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Finding the Fourth Proportional to 458,959.20, 688,503.60 and 143,383.20

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Solution

The fourth proportional to 458,959.20, 688,503.60 and 143,383.20 is: 215,095.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,959.20 : 688,503.60 = 143,383.20 : x
  2. Step 2: Convert to fraction form
    458,959.20/688,503.60 = 143,383.20/x
  3. Step 3: Cross multiply
    458,959.20x = 688,503.60 × 143,383.20
  4. Step 4: Simplify right side
    458,959.20x = 98,719,849,379.52
  5. Step 5: Solve for x
    x = 98,719,849,379.52/458,959.20
  6. Step 6: Final answer
    x = 215,095.04

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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.