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Finding the Fourth Proportional to 310,638.99, 465,275.49 and 256,719.87

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Solution

The fourth proportional to 310,638.99, 465,275.49 and 256,719.87 is: 384,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,638.99 : 465,275.49 = 256,719.87 : x
  2. Step 2: Convert to fraction form
    310,638.99/465,275.49 = 256,719.87/x
  3. Step 3: Cross multiply
    310,638.99x = 465,275.49 × 256,719.87
  4. Step 4: Simplify right side
    310,638.99x = 119,445,463,306.99
  5. Step 5: Solve for x
    x = 119,445,463,306.99/310,638.99
  6. Step 6: Final answer
    x = 384,515.36

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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.