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Finding the Fourth Proportional to 1,479.50, 2,041.70 and 816.36

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Solution

The fourth proportional to 1,479.50, 2,041.70 and 816.36 is: 1,126.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.50 : 2,041.70 = 816.36 : x
  2. Step 2: Convert to fraction form
    1,479.50/2,041.70 = 816.36/x
  3. Step 3: Cross multiply
    1,479.50x = 2,041.70 × 816.36
  4. Step 4: Simplify right side
    1,479.50x = 1,666,762.21
  5. Step 5: Solve for x
    x = 1,666,762.21/1,479.50
  6. Step 6: Final answer
    x = 1,126.57

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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.