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Finding the Fourth Proportional to 253,220.16, 349,429.68 and 138,476.16

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Solution

The fourth proportional to 253,220.16, 349,429.68 and 138,476.16 is: 191,089.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,220.16 : 349,429.68 = 138,476.16 : x
  2. Step 2: Convert to fraction form
    253,220.16/349,429.68 = 138,476.16/x
  3. Step 3: Cross multiply
    253,220.16x = 349,429.68 × 138,476.16
  4. Step 4: Simplify right side
    253,220.16x = 48,387,680,276.43
  5. Step 5: Solve for x
    x = 48,387,680,276.43/253,220.16
  6. Step 6: Final answer
    x = 191,089.37

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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.