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Finding the Fourth Proportional to 914.25, 1,368.93 and 707.70

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Solution

The fourth proportional to 914.25, 1,368.93 and 707.70 is: 1,059.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.25 : 1,368.93 = 707.70 : x
  2. Step 2: Convert to fraction form
    914.25/1,368.93 = 707.70/x
  3. Step 3: Cross multiply
    914.25x = 1,368.93 × 707.70
  4. Step 4: Simplify right side
    914.25x = 968,791.76
  5. Step 5: Solve for x
    x = 968,791.76/914.25
  6. Step 6: Final answer
    x = 1,059.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.