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Finding the Fourth Proportional to 973.88, 1,341.12 and 678.63

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Solution

The fourth proportional to 973.88, 1,341.12 and 678.63 is: 934.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.88 : 1,341.12 = 678.63 : x
  2. Step 2: Convert to fraction form
    973.88/1,341.12 = 678.63/x
  3. Step 3: Cross multiply
    973.88x = 1,341.12 × 678.63
  4. Step 4: Simplify right side
    973.88x = 910,124.27
  5. Step 5: Solve for x
    x = 910,124.27/973.88
  6. Step 6: Final answer
    x = 934.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.