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Finding the Fourth Proportional to 398,500.56, 549,923.58 and 228,721.32

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Solution

The fourth proportional to 398,500.56, 549,923.58 and 228,721.32 is: 315,631.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,500.56 : 549,923.58 = 228,721.32 : x
  2. Step 2: Convert to fraction form
    398,500.56/549,923.58 = 228,721.32/x
  3. Step 3: Cross multiply
    398,500.56x = 549,923.58 × 228,721.32
  4. Step 4: Simplify right side
    398,500.56x = 125,779,247,116.73
  5. Step 5: Solve for x
    x = 125,779,247,116.73/398,500.56
  6. Step 6: Final answer
    x = 315,631.29

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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.