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Finding the Fourth Proportional to 457.95, 631.52 and 405.51

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Solution

The fourth proportional to 457.95, 631.52 and 405.51 is: 559.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.95 : 631.52 = 405.51 : x
  2. Step 2: Convert to fraction form
    457.95/631.52 = 405.51/x
  3. Step 3: Cross multiply
    457.95x = 631.52 × 405.51
  4. Step 4: Simplify right side
    457.95x = 256,085.65
  5. Step 5: Solve for x
    x = 256,085.65/457.95
  6. Step 6: Final answer
    x = 559.20

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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.