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Finding the Fourth Proportional to 1,202.69, 1,803.95 and 715.32

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Solution

The fourth proportional to 1,202.69, 1,803.95 and 715.32 is: 1,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.69 : 1,803.95 = 715.32 : x
  2. Step 2: Convert to fraction form
    1,202.69/1,803.95 = 715.32/x
  3. Step 3: Cross multiply
    1,202.69x = 1,803.95 × 715.32
  4. Step 4: Simplify right side
    1,202.69x = 1,290,397.94
  5. Step 5: Solve for x
    x = 1,290,397.94/1,202.69
  6. Step 6: Final answer
    x = 1,072.93

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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.