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Finding the Fourth Proportional to 623.84, 860.76 and 402.76

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Solution

The fourth proportional to 623.84, 860.76 and 402.76 is: 555.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.84 : 860.76 = 402.76 : x
  2. Step 2: Convert to fraction form
    623.84/860.76 = 402.76/x
  3. Step 3: Cross multiply
    623.84x = 860.76 × 402.76
  4. Step 4: Simplify right side
    623.84x = 346,675.39
  5. Step 5: Solve for x
    x = 346,675.39/623.84
  6. Step 6: Final answer
    x = 555.71

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Find fourth proportional to 311.92, 430.38 and 201.38
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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.