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Finding the Fourth Proportional to 398,373.51, 549,709.11 and 243,246.78

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Solution

The fourth proportional to 398,373.51, 549,709.11 and 243,246.78 is: 335,652.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,373.51 : 549,709.11 = 243,246.78 : x
  2. Step 2: Convert to fraction form
    398,373.51/549,709.11 = 243,246.78/x
  3. Step 3: Cross multiply
    398,373.51x = 549,709.11 × 243,246.78
  4. Step 4: Simplify right side
    398,373.51x = 133,714,970,944.17
  5. Step 5: Solve for x
    x = 133,714,970,944.17/398,373.51
  6. Step 6: Final answer
    x = 335,652.26

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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.