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Finding the Fourth Proportional to 579,613.86, 869,671.08 and 313,561.80

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Solution

The fourth proportional to 579,613.86, 869,671.08 and 313,561.80 is: 470,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,613.86 : 869,671.08 = 313,561.80 : x
  2. Step 2: Convert to fraction form
    579,613.86/869,671.08 = 313,561.80/x
  3. Step 3: Cross multiply
    579,613.86x = 869,671.08 × 313,561.80
  4. Step 4: Simplify right side
    579,613.86x = 272,695,629,252.74
  5. Step 5: Solve for x
    x = 272,695,629,252.74/579,613.86
  6. Step 6: Final answer
    x = 470,478.10

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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.