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Finding the Fourth Proportional to 316,309.10, 474,464.10 and 129,320.60

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Solution

The fourth proportional to 316,309.10, 474,464.10 and 129,320.60 is: 193,981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,309.10 : 474,464.10 = 129,320.60 : x
  2. Step 2: Convert to fraction form
    316,309.10/474,464.10 = 129,320.60/x
  3. Step 3: Cross multiply
    316,309.10x = 474,464.10 × 129,320.60
  4. Step 4: Simplify right side
    316,309.10x = 61,357,982,090.46
  5. Step 5: Solve for x
    x = 61,357,982,090.46/316,309.10
  6. Step 6: Final answer
    x = 193,981.08

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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.