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Finding the Fourth Proportional to 1,035.84, 1,428.68 and 703.76

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Solution

The fourth proportional to 1,035.84, 1,428.68 and 703.76 is: 970.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.84 : 1,428.68 = 703.76 : x
  2. Step 2: Convert to fraction form
    1,035.84/1,428.68 = 703.76/x
  3. Step 3: Cross multiply
    1,035.84x = 1,428.68 × 703.76
  4. Step 4: Simplify right side
    1,035.84x = 1,005,447.84
  5. Step 5: Solve for x
    x = 1,005,447.84/1,035.84
  6. Step 6: Final answer
    x = 970.66

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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.