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Finding the Fourth Proportional to 579,658.40, 869,082.60 and 342,879.20

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Solution

The fourth proportional to 579,658.40, 869,082.60 and 342,879.20 is: 514,079.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,658.40 : 869,082.60 = 342,879.20 : x
  2. Step 2: Convert to fraction form
    579,658.40/869,082.60 = 342,879.20/x
  3. Step 3: Cross multiply
    579,658.40x = 869,082.60 × 342,879.20
  4. Step 4: Simplify right side
    579,658.40x = 297,990,346,621.92
  5. Step 5: Solve for x
    x = 297,990,346,621.92/579,658.40
  6. Step 6: Final answer
    x = 514,079.23

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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.