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Finding the Fourth Proportional to 398,395.39, 549,778.27 and 217,108.58

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Solution

The fourth proportional to 398,395.39, 549,778.27 and 217,108.58 is: 299,605.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,395.39 : 549,778.27 = 217,108.58 : x
  2. Step 2: Convert to fraction form
    398,395.39/549,778.27 = 217,108.58/x
  3. Step 3: Cross multiply
    398,395.39x = 549,778.27 × 217,108.58
  4. Step 4: Simplify right side
    398,395.39x = 119,361,578,429.01
  5. Step 5: Solve for x
    x = 119,361,578,429.01/398,395.39
  6. Step 6: Final answer
    x = 299,605.82

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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.