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Finding the Fourth Proportional to 623.50, 860.54 and 402.63

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Solution

The fourth proportional to 623.50, 860.54 and 402.63 is: 555.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.50 : 860.54 = 402.63 : x
  2. Step 2: Convert to fraction form
    623.50/860.54 = 402.63/x
  3. Step 3: Cross multiply
    623.50x = 860.54 × 402.63
  4. Step 4: Simplify right side
    623.50x = 346,479.22
  5. Step 5: Solve for x
    x = 346,479.22/623.50
  6. Step 6: Final answer
    x = 555.70

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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.