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Finding the Fourth Proportional to 1,953.70, 2,931.16 and 1,492

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Solution

The fourth proportional to 1,953.70, 2,931.16 and 1,492 is: 2,238.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.70 : 2,931.16 = 1,492 : x
  2. Step 2: Convert to fraction form
    1,953.70/2,931.16 = 1,492/x
  3. Step 3: Cross multiply
    1,953.70x = 2,931.16 × 1,492
  4. Step 4: Simplify right side
    1,953.70x = 4,373,290.72
  5. Step 5: Solve for x
    x = 4,373,290.72/1,953.70
  6. Step 6: Final answer
    x = 2,238.47

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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.