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Finding the Fourth Proportional to 478,265.40, 660,036.10 and 263,405.41

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Solution

The fourth proportional to 478,265.40, 660,036.10 and 263,405.41 is: 363,515.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,265.40 : 660,036.10 = 263,405.41 : x
  2. Step 2: Convert to fraction form
    478,265.40/660,036.10 = 263,405.41/x
  3. Step 3: Cross multiply
    478,265.40x = 660,036.10 × 263,405.41
  4. Step 4: Simplify right side
    478,265.40x = 173,857,074,918.09
  5. Step 5: Solve for x
    x = 173,857,074,918.09/478,265.40
  6. Step 6: Final answer
    x = 363,515.90

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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.