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Finding the Fourth Proportional to 258,373.20, 387,567.36 and 71,384.88

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Solution

The fourth proportional to 258,373.20, 387,567.36 and 71,384.88 is: 107,079.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,373.20 : 387,567.36 = 71,384.88 : x
  2. Step 2: Convert to fraction form
    258,373.20/387,567.36 = 71,384.88/x
  3. Step 3: Cross multiply
    258,373.20x = 387,567.36 × 71,384.88
  4. Step 4: Simplify right side
    258,373.20x = 27,666,449,485.52
  5. Step 5: Solve for x
    x = 27,666,449,485.52/258,373.20
  6. Step 6: Final answer
    x = 107,079.41

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1.5x scale

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.