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Finding the Fourth Proportional to 320,436.80, 480,655.20 and 292,443.20

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Solution

The fourth proportional to 320,436.80, 480,655.20 and 292,443.20 is: 438,664.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,436.80 : 480,655.20 = 292,443.20 : x
  2. Step 2: Convert to fraction form
    320,436.80/480,655.20 = 292,443.20/x
  3. Step 3: Cross multiply
    320,436.80x = 480,655.20 × 292,443.20
  4. Step 4: Simplify right side
    320,436.80x = 140,564,344,784.64
  5. Step 5: Solve for x
    x = 140,564,344,784.64/320,436.80
  6. Step 6: Final answer
    x = 438,664.80

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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.