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Finding the Fourth Proportional to 815,874.28, 1,223,626.62 and 310,255

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Solution

The fourth proportional to 815,874.28, 1,223,626.62 and 310,255 is: 465,312.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,874.28 : 1,223,626.62 = 310,255 : x
  2. Step 2: Convert to fraction form
    815,874.28/1,223,626.62 = 310,255/x
  3. Step 3: Cross multiply
    815,874.28x = 1,223,626.62 × 310,255
  4. Step 4: Simplify right side
    815,874.28x = 379,636,276,988.10
  5. Step 5: Solve for x
    x = 379,636,276,988.10/815,874.28
  6. Step 6: Final answer
    x = 465,312.23

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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.