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Finding the Fourth Proportional to 879.36, 1,320.00 and 647.53

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Solution

The fourth proportional to 879.36, 1,320.00 and 647.53 is: 972.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.36 : 1,320.00 = 647.53 : x
  2. Step 2: Convert to fraction form
    879.36/1,320.00 = 647.53/x
  3. Step 3: Cross multiply
    879.36x = 1,320.00 × 647.53
  4. Step 4: Simplify right side
    879.36x = 854,733.87
  5. Step 5: Solve for x
    x = 854,733.87/879.36
  6. Step 6: Final answer
    x = 972.00

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