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Finding the Fourth Proportional to 256,460.80, 384,691.20 and 145,868.80

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Solution

The fourth proportional to 256,460.80, 384,691.20 and 145,868.80 is: 218,803.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,460.80 : 384,691.20 = 145,868.80 : x
  2. Step 2: Convert to fraction form
    256,460.80/384,691.20 = 145,868.80/x
  3. Step 3: Cross multiply
    256,460.80x = 384,691.20 × 145,868.80
  4. Step 4: Simplify right side
    256,460.80x = 56,114,443,714.56
  5. Step 5: Solve for x
    x = 56,114,443,714.56/256,460.80
  6. Step 6: Final answer
    x = 218,803.20

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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.