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Finding the Fourth Proportional to 501.58, 691.50 and 428.68

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Solution

The fourth proportional to 501.58, 691.50 and 428.68 is: 591.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.58 : 691.50 = 428.68 : x
  2. Step 2: Convert to fraction form
    501.58/691.50 = 428.68/x
  3. Step 3: Cross multiply
    501.58x = 691.50 × 428.68
  4. Step 4: Simplify right side
    501.58x = 296,432.22
  5. Step 5: Solve for x
    x = 296,432.22/501.58
  6. Step 6: Final answer
    x = 591.00

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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.