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Finding the Fourth Proportional to 318,789.60, 478,897.20 and 266,301.60

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Solution

The fourth proportional to 318,789.60, 478,897.20 and 266,301.60 is: 400,047.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,789.60 : 478,897.20 = 266,301.60 : x
  2. Step 2: Convert to fraction form
    318,789.60/478,897.20 = 266,301.60/x
  3. Step 3: Cross multiply
    318,789.60x = 478,897.20 × 266,301.60
  4. Step 4: Simplify right side
    318,789.60x = 127,531,090,595.52
  5. Step 5: Solve for x
    x = 127,531,090,595.52/318,789.60
  6. Step 6: Final answer
    x = 400,047.84

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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.