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Finding the Fourth Proportional to 1,040.81, 1,564.55 and 837.63

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Solution

The fourth proportional to 1,040.81, 1,564.55 and 837.63 is: 1,259.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.81 : 1,564.55 = 837.63 : x
  2. Step 2: Convert to fraction form
    1,040.81/1,564.55 = 837.63/x
  3. Step 3: Cross multiply
    1,040.81x = 1,564.55 × 837.63
  4. Step 4: Simplify right side
    1,040.81x = 1,310,509.83
  5. Step 5: Solve for x
    x = 1,310,509.83/1,040.81
  6. Step 6: Final answer
    x = 1,259.13

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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.