Home / 280,423.60-386,991.20-153,100.10

Finding the Fourth Proportional to 280,423.60, 386,991.20 and 153,100.10

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Solution

The fourth proportional to 280,423.60, 386,991.20 and 153,100.10 is: 211,281.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,423.60 : 386,991.20 = 153,100.10 : x
  2. Step 2: Convert to fraction form
    280,423.60/386,991.20 = 153,100.10/x
  3. Step 3: Cross multiply
    280,423.60x = 386,991.20 × 153,100.10
  4. Step 4: Simplify right side
    280,423.60x = 59,248,391,419.12
  5. Step 5: Solve for x
    x = 59,248,391,419.12/280,423.60
  6. Step 6: Final answer
    x = 211,281.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.