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Finding the Fourth Proportional to 631,280.63, 871,211.76 and 359,348.65

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Solution

The fourth proportional to 631,280.63, 871,211.76 and 359,348.65 is: 495,926.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,280.63 : 871,211.76 = 359,348.65 : x
  2. Step 2: Convert to fraction form
    631,280.63/871,211.76 = 359,348.65/x
  3. Step 3: Cross multiply
    631,280.63x = 871,211.76 × 359,348.65
  4. Step 4: Simplify right side
    631,280.63x = 313,068,769,820.12
  5. Step 5: Solve for x
    x = 313,068,769,820.12/631,280.63
  6. Step 6: Final answer
    x = 495,926.46

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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.