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Finding the Fourth Proportional to 988.66, 1,475.03 and 942.22

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Solution

The fourth proportional to 988.66, 1,475.03 and 942.22 is: 1,405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.66 : 1,475.03 = 942.22 : x
  2. Step 2: Convert to fraction form
    988.66/1,475.03 = 942.22/x
  3. Step 3: Cross multiply
    988.66x = 1,475.03 × 942.22
  4. Step 4: Simplify right side
    988.66x = 1,389,802.77
  5. Step 5: Solve for x
    x = 1,389,802.77/988.66
  6. Step 6: Final answer
    x = 1,405.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.