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Finding the Fourth Proportional to 877.13, 1,315.26 and 414.51

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Solution

The fourth proportional to 877.13, 1,315.26 and 414.51 is: 621.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.13 : 1,315.26 = 414.51 : x
  2. Step 2: Convert to fraction form
    877.13/1,315.26 = 414.51/x
  3. Step 3: Cross multiply
    877.13x = 1,315.26 × 414.51
  4. Step 4: Simplify right side
    877.13x = 545,188.42
  5. Step 5: Solve for x
    x = 545,188.42/877.13
  6. Step 6: Final answer
    x = 621.56

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1.5x scale

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.