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Finding the Fourth Proportional to 1,870.77, 2,807.55 and 701.85

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Solution

The fourth proportional to 1,870.77, 2,807.55 and 701.85 is: 1,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.77 : 2,807.55 = 701.85 : x
  2. Step 2: Convert to fraction form
    1,870.77/2,807.55 = 701.85/x
  3. Step 3: Cross multiply
    1,870.77x = 2,807.55 × 701.85
  4. Step 4: Simplify right side
    1,870.77x = 1,970,478.97
  5. Step 5: Solve for x
    x = 1,970,478.97/1,870.77
  6. Step 6: Final answer
    x = 1,053.30

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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.