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Finding the Fourth Proportional to 398,176.85, 549,488.84 and 216,890.25

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Solution

The fourth proportional to 398,176.85, 549,488.84 and 216,890.25 is: 299,311.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,176.85 : 549,488.84 = 216,890.25 : x
  2. Step 2: Convert to fraction form
    398,176.85/549,488.84 = 216,890.25/x
  3. Step 3: Cross multiply
    398,176.85x = 549,488.84 × 216,890.25
  4. Step 4: Simplify right side
    398,176.85x = 119,178,770,795.36
  5. Step 5: Solve for x
    x = 119,178,770,795.36/398,176.85
  6. Step 6: Final answer
    x = 299,311.15

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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.