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Finding the Fourth Proportional to 398,389.26, 549,763.20 and 217,097.49

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Solution

The fourth proportional to 398,389.26, 549,763.20 and 217,097.49 is: 299,586.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,389.26 : 549,763.20 = 217,097.49 : x
  2. Step 2: Convert to fraction form
    398,389.26/549,763.20 = 217,097.49/x
  3. Step 3: Cross multiply
    398,389.26x = 549,763.20 × 217,097.49
  4. Step 4: Simplify right side
    398,389.26x = 119,352,210,814.37
  5. Step 5: Solve for x
    x = 119,352,210,814.37/398,389.26
  6. Step 6: Final answer
    x = 299,586.92

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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.