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Finding the Fourth Proportional to 561,079.55, 774,294.71 and 319,377.68

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Solution

The fourth proportional to 561,079.55, 774,294.71 and 319,377.68 is: 440,744.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,079.55 : 774,294.71 = 319,377.68 : x
  2. Step 2: Convert to fraction form
    561,079.55/774,294.71 = 319,377.68/x
  3. Step 3: Cross multiply
    561,079.55x = 774,294.71 × 319,377.68
  4. Step 4: Simplify right side
    561,079.55x = 247,292,442,647.71
  5. Step 5: Solve for x
    x = 247,292,442,647.71/561,079.55
  6. Step 6: Final answer
    x = 440,744.00

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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.