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Finding the Fourth Proportional to 778,602.88, 1,074,472 and 439,070.72

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Solution

The fourth proportional to 778,602.88, 1,074,472 and 439,070.72 is: 605,917.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,602.88 : 1,074,472 = 439,070.72 : x
  2. Step 2: Convert to fraction form
    778,602.88/1,074,472 = 439,070.72/x
  3. Step 3: Cross multiply
    778,602.88x = 1,074,472 × 439,070.72
  4. Step 4: Simplify right side
    778,602.88x = 471,769,194,659.84
  5. Step 5: Solve for x
    x = 471,769,194,659.84/778,602.88
  6. Step 6: Final answer
    x = 605,917.61

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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.