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Finding the Fourth Proportional to 778,978.60, 1,168,856.70 and 442,277.80

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Solution

The fourth proportional to 778,978.60, 1,168,856.70 and 442,277.80 is: 663,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,978.60 : 1,168,856.70 = 442,277.80 : x
  2. Step 2: Convert to fraction form
    778,978.60/1,168,856.70 = 442,277.80/x
  3. Step 3: Cross multiply
    778,978.60x = 1,168,856.70 × 442,277.80
  4. Step 4: Simplify right side
    778,978.60x = 516,959,369,791.26
  5. Step 5: Solve for x
    x = 516,959,369,791.26/778,978.60
  6. Step 6: Final answer
    x = 663,637.45

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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.