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Finding the Fourth Proportional to 778,879.78, 1,074,886.77 and 439,347.94

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Solution

The fourth proportional to 778,879.78, 1,074,886.77 and 439,347.94 is: 606,318.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,879.78 : 1,074,886.77 = 439,347.94 : x
  2. Step 2: Convert to fraction form
    778,879.78/1,074,886.77 = 439,347.94/x
  3. Step 3: Cross multiply
    778,879.78x = 1,074,886.77 × 439,347.94
  4. Step 4: Simplify right side
    778,879.78x = 472,249,288,132.75
  5. Step 5: Solve for x
    x = 472,249,288,132.75/778,879.78
  6. Step 6: Final answer
    x = 606,318.59

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1.5x scale

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.