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Finding the Fourth Proportional to 254,881.80, 382,310.55 and 86,385.60

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Solution

The fourth proportional to 254,881.80, 382,310.55 and 86,385.60 is: 129,574.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,881.80 : 382,310.55 = 86,385.60 : x
  2. Step 2: Convert to fraction form
    254,881.80/382,310.55 = 86,385.60/x
  3. Step 3: Cross multiply
    254,881.80x = 382,310.55 × 86,385.60
  4. Step 4: Simplify right side
    254,881.80x = 33,026,126,248.08
  5. Step 5: Solve for x
    x = 33,026,126,248.08/254,881.80
  6. Step 6: Final answer
    x = 129,574.28

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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.