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Finding the Fourth Proportional to 2,920.86, 4,030.02 and 1,859.22

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Solution

The fourth proportional to 2,920.86, 4,030.02 and 1,859.22 is: 2,565.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.86 : 4,030.02 = 1,859.22 : x
  2. Step 2: Convert to fraction form
    2,920.86/4,030.02 = 1,859.22/x
  3. Step 3: Cross multiply
    2,920.86x = 4,030.02 × 1,859.22
  4. Step 4: Simplify right side
    2,920.86x = 7,492,693.78
  5. Step 5: Solve for x
    x = 7,492,693.78/2,920.86
  6. Step 6: Final answer
    x = 2,565.24

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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.