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Finding the Fourth Proportional to 912.40, 1,368.77 and 296.13

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Solution

The fourth proportional to 912.40, 1,368.77 and 296.13 is: 444.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.40 : 1,368.77 = 296.13 : x
  2. Step 2: Convert to fraction form
    912.40/1,368.77 = 296.13/x
  3. Step 3: Cross multiply
    912.40x = 1,368.77 × 296.13
  4. Step 4: Simplify right side
    912.40x = 405,337.51
  5. Step 5: Solve for x
    x = 405,337.51/912.40
  6. Step 6: Final answer
    x = 444.26

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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.