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Finding the Fourth Proportional to 991.95, 1,486.29 and 954.01

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Solution

The fourth proportional to 991.95, 1,486.29 and 954.01 is: 1,429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.95 : 1,486.29 = 954.01 : x
  2. Step 2: Convert to fraction form
    991.95/1,486.29 = 954.01/x
  3. Step 3: Cross multiply
    991.95x = 1,486.29 × 954.01
  4. Step 4: Simplify right side
    991.95x = 1,417,935.52
  5. Step 5: Solve for x
    x = 1,417,935.52/991.95
  6. Step 6: Final answer
    x = 1,429.44

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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.