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Finding the Fourth Proportional to 348,130.80, 521,159.40 and 207,817.20

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Solution

The fourth proportional to 348,130.80, 521,159.40 and 207,817.20 is: 311,106.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,130.80 : 521,159.40 = 207,817.20 : x
  2. Step 2: Convert to fraction form
    348,130.80/521,159.40 = 207,817.20/x
  3. Step 3: Cross multiply
    348,130.80x = 521,159.40 × 207,817.20
  4. Step 4: Simplify right side
    348,130.80x = 108,305,887,261.68
  5. Step 5: Solve for x
    x = 108,305,887,261.68/348,130.80
  6. Step 6: Final answer
    x = 311,106.88

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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.