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Finding the Fourth Proportional to 317,139.86, 474,776.66 and 211,697.30

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Solution

The fourth proportional to 317,139.86, 474,776.66 and 211,697.30 is: 316,923.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,139.86 : 474,776.66 = 211,697.30 : x
  2. Step 2: Convert to fraction form
    317,139.86/474,776.66 = 211,697.30/x
  3. Step 3: Cross multiply
    317,139.86x = 474,776.66 × 211,697.30
  4. Step 4: Simplify right side
    317,139.86x = 100,508,937,025.02
  5. Step 5: Solve for x
    x = 100,508,937,025.02/317,139.86
  6. Step 6: Final answer
    x = 316,923.07

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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.