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Finding the Fourth Proportional to 887,754.72, 1,225,185.84 and 485,407.20

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Solution

The fourth proportional to 887,754.72, 1,225,185.84 and 485,407.20 is: 669,908.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,754.72 : 1,225,185.84 = 485,407.20 : x
  2. Step 2: Convert to fraction form
    887,754.72/1,225,185.84 = 485,407.20/x
  3. Step 3: Cross multiply
    887,754.72x = 1,225,185.84 × 485,407.20
  4. Step 4: Simplify right side
    887,754.72x = 594,714,028,074.05
  5. Step 5: Solve for x
    x = 594,714,028,074.05/887,754.72
  6. Step 6: Final answer
    x = 669,908.04

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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.