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Finding the Fourth Proportional to 907.64, 1,252.53 and 493.64

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Solution

The fourth proportional to 907.64, 1,252.53 and 493.64 is: 681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.64 : 1,252.53 = 493.64 : x
  2. Step 2: Convert to fraction form
    907.64/1,252.53 = 493.64/x
  3. Step 3: Cross multiply
    907.64x = 1,252.53 × 493.64
  4. Step 4: Simplify right side
    907.64x = 618,298.91
  5. Step 5: Solve for x
    x = 618,298.91/907.64
  6. Step 6: Final answer
    x = 681.22

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1.5x scale

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.