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Finding the Fourth Proportional to 398,417.97, 549,800.75 and 217,126.01

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Solution

The fourth proportional to 398,417.97, 549,800.75 and 217,126.01 is: 299,625.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,417.97 : 549,800.75 = 217,126.01 : x
  2. Step 2: Convert to fraction form
    398,417.97/549,800.75 = 217,126.01/x
  3. Step 3: Cross multiply
    398,417.97x = 549,800.75 × 217,126.01
  4. Step 4: Simplify right side
    398,417.97x = 119,376,045,059.82
  5. Step 5: Solve for x
    x = 119,376,045,059.82/398,417.97
  6. Step 6: Final answer
    x = 299,625.15

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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.