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Finding the Fourth Proportional to 408,088.40, 612,132.60 and 127,605.20

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Solution

The fourth proportional to 408,088.40, 612,132.60 and 127,605.20 is: 191,407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,088.40 : 612,132.60 = 127,605.20 : x
  2. Step 2: Convert to fraction form
    408,088.40/612,132.60 = 127,605.20/x
  3. Step 3: Cross multiply
    408,088.40x = 612,132.60 × 127,605.20
  4. Step 4: Simplify right side
    408,088.40x = 78,111,302,849.52
  5. Step 5: Solve for x
    x = 78,111,302,849.52/408,088.40
  6. Step 6: Final answer
    x = 191,407.80

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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.