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Finding the Fourth Proportional to 307,385.71, 424,191.45 and 171,419.81

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Solution

The fourth proportional to 307,385.71, 424,191.45 and 171,419.81 is: 236,558.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,385.71 : 424,191.45 = 171,419.81 : x
  2. Step 2: Convert to fraction form
    307,385.71/424,191.45 = 171,419.81/x
  3. Step 3: Cross multiply
    307,385.71x = 424,191.45 × 171,419.81
  4. Step 4: Simplify right side
    307,385.71x = 72,714,817,762.62
  5. Step 5: Solve for x
    x = 72,714,817,762.62/307,385.71
  6. Step 6: Final answer
    x = 236,558.88

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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.