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Finding the Fourth Proportional to 948.77, 1,420.50 and 716.93

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Solution

The fourth proportional to 948.77, 1,420.50 and 716.93 is: 1,073.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.77 : 1,420.50 = 716.93 : x
  2. Step 2: Convert to fraction form
    948.77/1,420.50 = 716.93/x
  3. Step 3: Cross multiply
    948.77x = 1,420.50 × 716.93
  4. Step 4: Simplify right side
    948.77x = 1,018,399.07
  5. Step 5: Solve for x
    x = 1,018,399.07/948.77
  6. Step 6: Final answer
    x = 1,073.39

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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.