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Finding the Fourth Proportional to 385,851.60, 577,999.80 and 219,445.20

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Solution

The fourth proportional to 385,851.60, 577,999.80 and 219,445.20 is: 328,725.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,851.60 : 577,999.80 = 219,445.20 : x
  2. Step 2: Convert to fraction form
    385,851.60/577,999.80 = 219,445.20/x
  3. Step 3: Cross multiply
    385,851.60x = 577,999.80 × 219,445.20
  4. Step 4: Simplify right side
    385,851.60x = 126,839,281,710.96
  5. Step 5: Solve for x
    x = 126,839,281,710.96/385,851.60
  6. Step 6: Final answer
    x = 328,725.56

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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.