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Finding the Fourth Proportional to 316,065.20, 474,000.60 and 91,446.80

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Solution

The fourth proportional to 316,065.20, 474,000.60 and 91,446.80 is: 137,142.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,065.20 : 474,000.60 = 91,446.80 : x
  2. Step 2: Convert to fraction form
    316,065.20/474,000.60 = 91,446.80/x
  3. Step 3: Cross multiply
    316,065.20x = 474,000.60 × 91,446.80
  4. Step 4: Simplify right side
    316,065.20x = 43,345,838,068.08
  5. Step 5: Solve for x
    x = 43,345,838,068.08/316,065.20
  6. Step 6: Final answer
    x = 137,142.08

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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.