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Finding the Fourth Proportional to 1,931.16, 2,894.40 and 760.08

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Solution

The fourth proportional to 1,931.16, 2,894.40 and 760.08 is: 1,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.16 : 2,894.40 = 760.08 : x
  2. Step 2: Convert to fraction form
    1,931.16/2,894.40 = 760.08/x
  3. Step 3: Cross multiply
    1,931.16x = 2,894.40 × 760.08
  4. Step 4: Simplify right side
    1,931.16x = 2,199,975.55
  5. Step 5: Solve for x
    x = 2,199,975.55/1,931.16
  6. Step 6: Final answer
    x = 1,139.20

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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.