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Finding the Fourth Proportional to 5,207.59, 7,812.30 and 1,920.71

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Solution

The fourth proportional to 5,207.59, 7,812.30 and 1,920.71 is: 2,881.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,207.59 : 7,812.30 = 1,920.71 : x
  2. Step 2: Convert to fraction form
    5,207.59/7,812.30 = 1,920.71/x
  3. Step 3: Cross multiply
    5,207.59x = 7,812.30 × 1,920.71
  4. Step 4: Simplify right side
    5,207.59x = 15,005,178.66
  5. Step 5: Solve for x
    x = 15,005,178.66/5,207.59
  6. Step 6: Final answer
    x = 2,881.40

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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.