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Finding the Fourth Proportional to 952.86, 1,315.12 and 621.77

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Solution

The fourth proportional to 952.86, 1,315.12 and 621.77 is: 858.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.86 : 1,315.12 = 621.77 : x
  2. Step 2: Convert to fraction form
    952.86/1,315.12 = 621.77/x
  3. Step 3: Cross multiply
    952.86x = 1,315.12 × 621.77
  4. Step 4: Simplify right side
    952.86x = 817,702.16
  5. Step 5: Solve for x
    x = 817,702.16/952.86
  6. Step 6: Final answer
    x = 858.16

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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.