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Finding the Fourth Proportional to 1,357.69, 2,036.81 and 433.22

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Solution

The fourth proportional to 1,357.69, 2,036.81 and 433.22 is: 649.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.69 : 2,036.81 = 433.22 : x
  2. Step 2: Convert to fraction form
    1,357.69/2,036.81 = 433.22/x
  3. Step 3: Cross multiply
    1,357.69x = 2,036.81 × 433.22
  4. Step 4: Simplify right side
    1,357.69x = 882,386.83
  5. Step 5: Solve for x
    x = 882,386.83/1,357.69
  6. Step 6: Final answer
    x = 649.92

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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.