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Finding the Fourth Proportional to 1,874.02, 2,810.28 and 777.64

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Solution

The fourth proportional to 1,874.02, 2,810.28 and 777.64 is: 1,166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.02 : 2,810.28 = 777.64 : x
  2. Step 2: Convert to fraction form
    1,874.02/2,810.28 = 777.64/x
  3. Step 3: Cross multiply
    1,874.02x = 2,810.28 × 777.64
  4. Step 4: Simplify right side
    1,874.02x = 2,185,386.14
  5. Step 5: Solve for x
    x = 2,185,386.14/1,874.02
  6. Step 6: Final answer
    x = 1,166.15

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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.