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Finding the Fourth Proportional to 291,248.80, 435,998.40 and 172,859.20

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Solution

The fourth proportional to 291,248.80, 435,998.40 and 172,859.20 is: 258,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,248.80 : 435,998.40 = 172,859.20 : x
  2. Step 2: Convert to fraction form
    291,248.80/435,998.40 = 172,859.20/x
  3. Step 3: Cross multiply
    291,248.80x = 435,998.40 × 172,859.20
  4. Step 4: Simplify right side
    291,248.80x = 75,366,334,625.28
  5. Step 5: Solve for x
    x = 75,366,334,625.28/291,248.80
  6. Step 6: Final answer
    x = 258,769.60

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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.