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Finding the Fourth Proportional to 354,778.60, 532,319.10 and 186,428.20

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Solution

The fourth proportional to 354,778.60, 532,319.10 and 186,428.20 is: 279,721.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,778.60 : 532,319.10 = 186,428.20 : x
  2. Step 2: Convert to fraction form
    354,778.60/532,319.10 = 186,428.20/x
  3. Step 3: Cross multiply
    354,778.60x = 532,319.10 × 186,428.20
  4. Step 4: Simplify right side
    354,778.60x = 99,239,291,638.62
  5. Step 5: Solve for x
    x = 99,239,291,638.62/354,778.60
  6. Step 6: Final answer
    x = 279,721.75

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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.