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Finding the Fourth Proportional to 647.61, 971.93 and 493.91

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Solution

The fourth proportional to 647.61, 971.93 and 493.91 is: 741.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.61 : 971.93 = 493.91 : x
  2. Step 2: Convert to fraction form
    647.61/971.93 = 493.91/x
  3. Step 3: Cross multiply
    647.61x = 971.93 × 493.91
  4. Step 4: Simplify right side
    647.61x = 480,045.95
  5. Step 5: Solve for x
    x = 480,045.95/647.61
  6. Step 6: Final answer
    x = 741.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.