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Finding the Fourth Proportional to 639.42, 883.03 and 530.07

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Solution

The fourth proportional to 639.42, 883.03 and 530.07 is: 732.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.42 : 883.03 = 530.07 : x
  2. Step 2: Convert to fraction form
    639.42/883.03 = 530.07/x
  3. Step 3: Cross multiply
    639.42x = 883.03 × 530.07
  4. Step 4: Simplify right side
    639.42x = 468,067.71
  5. Step 5: Solve for x
    x = 468,067.71/639.42
  6. Step 6: Final answer
    x = 732.02

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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.