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Finding the Fourth Proportional to 398,048.72, 549,129.64 and 268,945.52

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Solution

The fourth proportional to 398,048.72, 549,129.64 and 268,945.52 is: 371,024.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,048.72 : 549,129.64 = 268,945.52 : x
  2. Step 2: Convert to fraction form
    398,048.72/549,129.64 = 268,945.52/x
  3. Step 3: Cross multiply
    398,048.72x = 549,129.64 × 268,945.52
  4. Step 4: Simplify right side
    398,048.72x = 147,685,956,577.21
  5. Step 5: Solve for x
    x = 147,685,956,577.21/398,048.72
  6. Step 6: Final answer
    x = 371,024.82

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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.