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Finding the Fourth Proportional to 623.85, 860.78 and 530.43

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Solution

The fourth proportional to 623.85, 860.78 and 530.43 is: 731.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.85 : 860.78 = 530.43 : x
  2. Step 2: Convert to fraction form
    623.85/860.78 = 530.43/x
  3. Step 3: Cross multiply
    623.85x = 860.78 × 530.43
  4. Step 4: Simplify right side
    623.85x = 456,580.88
  5. Step 5: Solve for x
    x = 456,580.88/623.85
  6. Step 6: Final answer
    x = 731.88

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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.