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Finding the Fourth Proportional to 977.42, 1,341.10 and 968.24

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Solution

The fourth proportional to 977.42, 1,341.10 and 968.24 is: 1,328.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.42 : 1,341.10 = 968.24 : x
  2. Step 2: Convert to fraction form
    977.42/1,341.10 = 968.24/x
  3. Step 3: Cross multiply
    977.42x = 1,341.10 × 968.24
  4. Step 4: Simplify right side
    977.42x = 1,298,506.66
  5. Step 5: Solve for x
    x = 1,298,506.66/977.42
  6. Step 6: Final answer
    x = 1,328.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.