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Finding the Fourth Proportional to 1,345.19, 2,017.79 and 695.47

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Solution

The fourth proportional to 1,345.19, 2,017.79 and 695.47 is: 1,043.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.19 : 2,017.79 = 695.47 : x
  2. Step 2: Convert to fraction form
    1,345.19/2,017.79 = 695.47/x
  3. Step 3: Cross multiply
    1,345.19x = 2,017.79 × 695.47
  4. Step 4: Simplify right side
    1,345.19x = 1,403,308.93
  5. Step 5: Solve for x
    x = 1,403,308.93/1,345.19
  6. Step 6: Final answer
    x = 1,043.21

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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.