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Finding the Fourth Proportional to 560,718.90, 773,765.06 and 318,978.72

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Solution

The fourth proportional to 560,718.90, 773,765.06 and 318,978.72 is: 440,175.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,718.90 : 773,765.06 = 318,978.72 : x
  2. Step 2: Convert to fraction form
    560,718.90/773,765.06 = 318,978.72/x
  3. Step 3: Cross multiply
    560,718.90x = 773,765.06 × 318,978.72
  4. Step 4: Simplify right side
    560,718.90x = 246,814,586,824.63
  5. Step 5: Solve for x
    x = 246,814,586,824.63/560,718.90
  6. Step 6: Final answer
    x = 440,175.26

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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.