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Finding the Fourth Proportional to 570.88, 787.20 and 558.88

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Solution

The fourth proportional to 570.88, 787.20 and 558.88 is: 770.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.88 : 787.20 = 558.88 : x
  2. Step 2: Convert to fraction form
    570.88/787.20 = 558.88/x
  3. Step 3: Cross multiply
    570.88x = 787.20 × 558.88
  4. Step 4: Simplify right side
    570.88x = 439,950.34
  5. Step 5: Solve for x
    x = 439,950.34/570.88
  6. Step 6: Final answer
    x = 770.65

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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.