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Finding the Fourth Proportional to 478,676.14, 660,564.52 and 260,886.78

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Solution

The fourth proportional to 478,676.14, 660,564.52 and 260,886.78 is: 360,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,676.14 : 660,564.52 = 260,886.78 : x
  2. Step 2: Convert to fraction form
    478,676.14/660,564.52 = 260,886.78/x
  3. Step 3: Cross multiply
    478,676.14x = 660,564.52 × 260,886.78
  4. Step 4: Simplify right side
    478,676.14x = 172,332,549,952.83
  5. Step 5: Solve for x
    x = 172,332,549,952.83/478,676.14
  6. Step 6: Final answer
    x = 360,019.10

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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.