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Finding the Fourth Proportional to 316,654.40, 474,981.60 and 79,997.76

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Solution

The fourth proportional to 316,654.40, 474,981.60 and 79,997.76 is: 119,996.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,654.40 : 474,981.60 = 79,997.76 : x
  2. Step 2: Convert to fraction form
    316,654.40/474,981.60 = 79,997.76/x
  3. Step 3: Cross multiply
    316,654.40x = 474,981.60 × 79,997.76
  4. Step 4: Simplify right side
    316,654.40x = 37,997,464,041.22
  5. Step 5: Solve for x
    x = 37,997,464,041.22/316,654.40
  6. Step 6: Final answer
    x = 119,996.64

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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.