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Finding the Fourth Proportional to 1,345.26, 2,017.89 and 479.64

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Solution

The fourth proportional to 1,345.26, 2,017.89 and 479.64 is: 719.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.26 : 2,017.89 = 479.64 : x
  2. Step 2: Convert to fraction form
    1,345.26/2,017.89 = 479.64/x
  3. Step 3: Cross multiply
    1,345.26x = 2,017.89 × 479.64
  4. Step 4: Simplify right side
    1,345.26x = 967,860.76
  5. Step 5: Solve for x
    x = 967,860.76/1,345.26
  6. Step 6: Final answer
    x = 719.46

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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.