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Finding the Fourth Proportional to 266,145.60, 399,218.40 and 239,419.20

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Solution

The fourth proportional to 266,145.60, 399,218.40 and 239,419.20 is: 359,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,145.60 : 399,218.40 = 239,419.20 : x
  2. Step 2: Convert to fraction form
    266,145.60/399,218.40 = 239,419.20/x
  3. Step 3: Cross multiply
    266,145.60x = 399,218.40 × 239,419.20
  4. Step 4: Simplify right side
    266,145.60x = 95,580,549,953.28
  5. Step 5: Solve for x
    x = 95,580,549,953.28/266,145.60
  6. Step 6: Final answer
    x = 359,128.80

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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.