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Finding the Fourth Proportional to 398,612.80, 549,774.60 and 255,386.24

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Solution

The fourth proportional to 398,612.80, 549,774.60 and 255,386.24 is: 352,233.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,612.80 : 549,774.60 = 255,386.24 : x
  2. Step 2: Convert to fraction form
    398,612.80/549,774.60 = 255,386.24/x
  3. Step 3: Cross multiply
    398,612.80x = 549,774.60 × 255,386.24
  4. Step 4: Simplify right side
    398,612.80x = 140,404,867,941.50
  5. Step 5: Solve for x
    x = 140,404,867,941.50/398,612.80
  6. Step 6: Final answer
    x = 352,233.72

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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.