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Finding the Fourth Proportional to 578,433.20, 865,900.20 and 515,447.60

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Solution

The fourth proportional to 578,433.20, 865,900.20 and 515,447.60 is: 771,612.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,433.20 : 865,900.20 = 515,447.60 : x
  2. Step 2: Convert to fraction form
    578,433.20/865,900.20 = 515,447.60/x
  3. Step 3: Cross multiply
    578,433.20x = 865,900.20 × 515,447.60
  4. Step 4: Simplify right side
    578,433.20x = 446,326,179,929.52
  5. Step 5: Solve for x
    x = 446,326,179,929.52/578,433.20
  6. Step 6: Final answer
    x = 771,612.31

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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.