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Finding the Fourth Proportional to 1,069.19, 1,603.86 and 375.78

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Solution

The fourth proportional to 1,069.19, 1,603.86 and 375.78 is: 563.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.19 : 1,603.86 = 375.78 : x
  2. Step 2: Convert to fraction form
    1,069.19/1,603.86 = 375.78/x
  3. Step 3: Cross multiply
    1,069.19x = 1,603.86 × 375.78
  4. Step 4: Simplify right side
    1,069.19x = 602,698.51
  5. Step 5: Solve for x
    x = 602,698.51/1,069.19
  6. Step 6: Final answer
    x = 563.70

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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.