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Finding the Fourth Proportional to 570.40, 787.68 and 454.80

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Solution

The fourth proportional to 570.40, 787.68 and 454.80 is: 628.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.40 : 787.68 = 454.80 : x
  2. Step 2: Convert to fraction form
    570.40/787.68 = 454.80/x
  3. Step 3: Cross multiply
    570.40x = 787.68 × 454.80
  4. Step 4: Simplify right side
    570.40x = 358,236.86
  5. Step 5: Solve for x
    x = 358,236.86/570.40
  6. Step 6: Final answer
    x = 628.04

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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.