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Finding the Fourth Proportional to 1,088.74, 1,502 and 695.68

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Solution

The fourth proportional to 1,088.74, 1,502 and 695.68 is: 959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.74 : 1,502 = 695.68 : x
  2. Step 2: Convert to fraction form
    1,088.74/1,502 = 695.68/x
  3. Step 3: Cross multiply
    1,088.74x = 1,502 × 695.68
  4. Step 4: Simplify right side
    1,088.74x = 1,044,911.36
  5. Step 5: Solve for x
    x = 1,044,911.36/1,088.74
  6. Step 6: Final answer
    x = 959.74

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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.