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Finding the Fourth Proportional to 886,869.10, 1,330,498.05 and 287,728.30

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Solution

The fourth proportional to 886,869.10, 1,330,498.05 and 287,728.30 is: 431,655.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,869.10 : 1,330,498.05 = 287,728.30 : x
  2. Step 2: Convert to fraction form
    886,869.10/1,330,498.05 = 287,728.30/x
  3. Step 3: Cross multiply
    886,869.10x = 1,330,498.05 × 287,728.30
  4. Step 4: Simplify right side
    886,869.10x = 382,821,942,079.82
  5. Step 5: Solve for x
    x = 382,821,942,079.82/886,869.10
  6. Step 6: Final answer
    x = 431,655.52

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Double scale
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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.