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Finding the Fourth Proportional to 438,645.60, 657,968.40 and 158,191.20

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Solution

The fourth proportional to 438,645.60, 657,968.40 and 158,191.20 is: 237,286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,645.60 : 657,968.40 = 158,191.20 : x
  2. Step 2: Convert to fraction form
    438,645.60/657,968.40 = 158,191.20/x
  3. Step 3: Cross multiply
    438,645.60x = 657,968.40 × 158,191.20
  4. Step 4: Simplify right side
    438,645.60x = 104,084,810,758.08
  5. Step 5: Solve for x
    x = 104,084,810,758.08/438,645.60
  6. Step 6: Final answer
    x = 237,286.80

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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.