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Finding the Fourth Proportional to 895.93, 1,235.65 and 631.25

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Solution

The fourth proportional to 895.93, 1,235.65 and 631.25 is: 870.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.93 : 1,235.65 = 631.25 : x
  2. Step 2: Convert to fraction form
    895.93/1,235.65 = 631.25/x
  3. Step 3: Cross multiply
    895.93x = 1,235.65 × 631.25
  4. Step 4: Simplify right side
    895.93x = 780,004.06
  5. Step 5: Solve for x
    x = 780,004.06/895.93
  6. Step 6: Final answer
    x = 870.61

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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.