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Finding the Fourth Proportional to 398,316.30, 549,669.55 and 217,029.73

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Solution

The fourth proportional to 398,316.30, 549,669.55 and 217,029.73 is: 299,497.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,316.30 : 549,669.55 = 217,029.73 : x
  2. Step 2: Convert to fraction form
    398,316.30/549,669.55 = 217,029.73/x
  3. Step 3: Cross multiply
    398,316.30x = 549,669.55 × 217,029.73
  4. Step 4: Simplify right side
    398,316.30x = 119,294,632,108.97
  5. Step 5: Solve for x
    x = 119,294,632,108.97/398,316.30
  6. Step 6: Final answer
    x = 299,497.24

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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.