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Finding the Fourth Proportional to 265,412.40, 398,118.60 and 87,925.20

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Solution

The fourth proportional to 265,412.40, 398,118.60 and 87,925.20 is: 131,887.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,412.40 : 398,118.60 = 87,925.20 : x
  2. Step 2: Convert to fraction form
    265,412.40/398,118.60 = 87,925.20/x
  3. Step 3: Cross multiply
    265,412.40x = 398,118.60 × 87,925.20
  4. Step 4: Simplify right side
    265,412.40x = 35,004,657,528.72
  5. Step 5: Solve for x
    x = 35,004,657,528.72/265,412.40
  6. Step 6: Final answer
    x = 131,887.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.