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Finding the Fourth Proportional to 383,426.60, 575,139.90 and 102,972.20

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Solution

The fourth proportional to 383,426.60, 575,139.90 and 102,972.20 is: 154,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,426.60 : 575,139.90 = 102,972.20 : x
  2. Step 2: Convert to fraction form
    383,426.60/575,139.90 = 102,972.20/x
  3. Step 3: Cross multiply
    383,426.60x = 575,139.90 × 102,972.20
  4. Step 4: Simplify right side
    383,426.60x = 59,223,420,810.78
  5. Step 5: Solve for x
    x = 59,223,420,810.78/383,426.60
  6. Step 6: Final answer
    x = 154,458.30

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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.