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Finding the Fourth Proportional to 778,590, 1,074,519.90 and 439,123.86

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Solution

The fourth proportional to 778,590, 1,074,519.90 and 439,123.86 is: 606,027.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,590 : 1,074,519.90 = 439,123.86 : x
  2. Step 2: Convert to fraction form
    778,590/1,074,519.90 = 439,123.86/x
  3. Step 3: Cross multiply
    778,590x = 1,074,519.90 × 439,123.86
  4. Step 4: Simplify right side
    778,590x = 471,847,326,134.81
  5. Step 5: Solve for x
    x = 471,847,326,134.81/778,590
  6. Step 6: Final answer
    x = 606,027.98

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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.