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Finding the Fourth Proportional to 316,658.64, 436,990.32 and 173,419.68

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Solution

The fourth proportional to 316,658.64, 436,990.32 and 173,419.68 is: 239,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,658.64 : 436,990.32 = 173,419.68 : x
  2. Step 2: Convert to fraction form
    316,658.64/436,990.32 = 173,419.68/x
  3. Step 3: Cross multiply
    316,658.64x = 436,990.32 × 173,419.68
  4. Step 4: Simplify right side
    316,658.64x = 75,782,721,457.50
  5. Step 5: Solve for x
    x = 75,782,721,457.50/316,658.64
  6. Step 6: Final answer
    x = 239,319.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.