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Finding the Fourth Proportional to 307,478.49, 424,320.96 and 171,508.95

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Solution

The fourth proportional to 307,478.49, 424,320.96 and 171,508.95 is: 236,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,478.49 : 424,320.96 = 171,508.95 : x
  2. Step 2: Convert to fraction form
    307,478.49/424,320.96 = 171,508.95/x
  3. Step 3: Cross multiply
    307,478.49x = 424,320.96 × 171,508.95
  4. Step 4: Simplify right side
    307,478.49x = 72,774,842,312.59
  5. Step 5: Solve for x
    x = 72,774,842,312.59/307,478.49
  6. Step 6: Final answer
    x = 236,682.71

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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.