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Finding the Fourth Proportional to 647.33, 891.88 and 577.40

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Solution

The fourth proportional to 647.33, 891.88 and 577.40 is: 795.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.33 : 891.88 = 577.40 : x
  2. Step 2: Convert to fraction form
    647.33/891.88 = 577.40/x
  3. Step 3: Cross multiply
    647.33x = 891.88 × 577.40
  4. Step 4: Simplify right side
    647.33x = 514,965.61
  5. Step 5: Solve for x
    x = 514,965.61/647.33
  6. Step 6: Final answer
    x = 795.53

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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.