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Finding the Fourth Proportional to 1,095.49, 1,512.80 and 703.20

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Solution

The fourth proportional to 1,095.49, 1,512.80 and 703.20 is: 971.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.49 : 1,512.80 = 703.20 : x
  2. Step 2: Convert to fraction form
    1,095.49/1,512.80 = 703.20/x
  3. Step 3: Cross multiply
    1,095.49x = 1,512.80 × 703.20
  4. Step 4: Simplify right side
    1,095.49x = 1,063,802.72
  5. Step 5: Solve for x
    x = 1,063,802.72/1,095.49
  6. Step 6: Final answer
    x = 971.08

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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.