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Finding the Fourth Proportional to 614,509.88, 847,542.90 and 399,718.55

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Solution

The fourth proportional to 614,509.88, 847,542.90 and 399,718.55 is: 551,298.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,509.88 : 847,542.90 = 399,718.55 : x
  2. Step 2: Convert to fraction form
    614,509.88/847,542.90 = 399,718.55/x
  3. Step 3: Cross multiply
    614,509.88x = 847,542.90 × 399,718.55
  4. Step 4: Simplify right side
    614,509.88x = 338,778,619,050.80
  5. Step 5: Solve for x
    x = 338,778,619,050.80/614,509.88
  6. Step 6: Final answer
    x = 551,298.90

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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.