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Finding the Fourth Proportional to 398,266.88, 549,606.65 and 216,978.26

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Solution

The fourth proportional to 398,266.88, 549,606.65 and 216,978.26 is: 299,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,266.88 : 549,606.65 = 216,978.26 : x
  2. Step 2: Convert to fraction form
    398,266.88/549,606.65 = 216,978.26/x
  3. Step 3: Cross multiply
    398,266.88x = 549,606.65 × 216,978.26
  4. Step 4: Simplify right side
    398,266.88x = 119,252,690,768.50
  5. Step 5: Solve for x
    x = 119,252,690,768.50/398,266.88
  6. Step 6: Final answer
    x = 299,429.10

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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.