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Finding the Fourth Proportional to 557.61, 835.51 and 395.01

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Solution

The fourth proportional to 557.61, 835.51 and 395.01 is: 591.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.61 : 835.51 = 395.01 : x
  2. Step 2: Convert to fraction form
    557.61/835.51 = 395.01/x
  3. Step 3: Cross multiply
    557.61x = 835.51 × 395.01
  4. Step 4: Simplify right side
    557.61x = 330,034.81
  5. Step 5: Solve for x
    x = 330,034.81/557.61
  6. Step 6: Final answer
    x = 591.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.