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Finding the Fourth Proportional to 916.13, 1,263.25 and 705.84

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Solution

The fourth proportional to 916.13, 1,263.25 and 705.84 is: 973.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.13 : 1,263.25 = 705.84 : x
  2. Step 2: Convert to fraction form
    916.13/1,263.25 = 705.84/x
  3. Step 3: Cross multiply
    916.13x = 1,263.25 × 705.84
  4. Step 4: Simplify right side
    916.13x = 891,652.38
  5. Step 5: Solve for x
    x = 891,652.38/916.13
  6. Step 6: Final answer
    x = 973.28

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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.