Home / 1,240,819.20-1,861,228.80-815,666.40

Finding the Fourth Proportional to 1,240,819.20, 1,861,228.80 and 815,666.40

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Solution

The fourth proportional to 1,240,819.20, 1,861,228.80 and 815,666.40 is: 1,223,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,819.20 : 1,861,228.80 = 815,666.40 : x
  2. Step 2: Convert to fraction form
    1,240,819.20/1,861,228.80 = 815,666.40/x
  3. Step 3: Cross multiply
    1,240,819.20x = 1,861,228.80 × 815,666.40
  4. Step 4: Simplify right side
    1,240,819.20x = 1,518,141,794,872.32
  5. Step 5: Solve for x
    x = 1,518,141,794,872.32/1,240,819.20
  6. Step 6: Final answer
    x = 1,223,499.60

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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.