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Finding the Fourth Proportional to 518,701.60, 778,052.40 and 515,424.80

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Solution

The fourth proportional to 518,701.60, 778,052.40 and 515,424.80 is: 773,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,701.60 : 778,052.40 = 515,424.80 : x
  2. Step 2: Convert to fraction form
    518,701.60/778,052.40 = 515,424.80/x
  3. Step 3: Cross multiply
    518,701.60x = 778,052.40 × 515,424.80
  4. Step 4: Simplify right side
    518,701.60x = 401,027,502,659.52
  5. Step 5: Solve for x
    x = 401,027,502,659.52/518,701.60
  6. Step 6: Final answer
    x = 773,137.20

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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.