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Finding the Fourth Proportional to 398,039.83, 549,280.45 and 216,747.78

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Solution

The fourth proportional to 398,039.83, 549,280.45 and 216,747.78 is: 299,104.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,039.83 : 549,280.45 = 216,747.78 : x
  2. Step 2: Convert to fraction form
    398,039.83/549,280.45 = 216,747.78/x
  3. Step 3: Cross multiply
    398,039.83x = 549,280.45 × 216,747.78
  4. Step 4: Simplify right side
    398,039.83x = 119,055,315,388.50
  5. Step 5: Solve for x
    x = 119,055,315,388.50/398,039.83
  6. Step 6: Final answer
    x = 299,104.03

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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.