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Finding the Fourth Proportional to 2,921.72, 4,381.23 and 973.40

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Solution

The fourth proportional to 2,921.72, 4,381.23 and 973.40 is: 1,459.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.72 : 4,381.23 = 973.40 : x
  2. Step 2: Convert to fraction form
    2,921.72/4,381.23 = 973.40/x
  3. Step 3: Cross multiply
    2,921.72x = 4,381.23 × 973.40
  4. Step 4: Simplify right side
    2,921.72x = 4,264,689.28
  5. Step 5: Solve for x
    x = 4,264,689.28/2,921.72
  6. Step 6: Final answer
    x = 1,459.65

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1.5x scale

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.