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Finding the Fourth Proportional to 347,643.20, 521,335.20 and 137,237.60

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Solution

The fourth proportional to 347,643.20, 521,335.20 and 137,237.60 is: 205,805.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,643.20 : 521,335.20 = 137,237.60 : x
  2. Step 2: Convert to fraction form
    347,643.20/521,335.20 = 137,237.60/x
  3. Step 3: Cross multiply
    347,643.20x = 521,335.20 × 137,237.60
  4. Step 4: Simplify right side
    347,643.20x = 71,546,791,643.52
  5. Step 5: Solve for x
    x = 71,546,791,643.52/347,643.20
  6. Step 6: Final answer
    x = 205,805.24

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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.