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Finding the Fourth Proportional to 555,809.32, 767,025.71 and 310,821.58

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Solution

The fourth proportional to 555,809.32, 767,025.71 and 310,821.58 is: 428,938.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,809.32 : 767,025.71 = 310,821.58 : x
  2. Step 2: Convert to fraction form
    555,809.32/767,025.71 = 310,821.58/x
  3. Step 3: Cross multiply
    555,809.32x = 767,025.71 × 310,821.58
  4. Step 4: Simplify right side
    555,809.32x = 238,408,143,082.82
  5. Step 5: Solve for x
    x = 238,408,143,082.82/555,809.32
  6. Step 6: Final answer
    x = 428,938.73

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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.