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Finding the Fourth Proportional to 1,348.45, 1,860.57 and 788.64

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Solution

The fourth proportional to 1,348.45, 1,860.57 and 788.64 is: 1,088.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.45 : 1,860.57 = 788.64 : x
  2. Step 2: Convert to fraction form
    1,348.45/1,860.57 = 788.64/x
  3. Step 3: Cross multiply
    1,348.45x = 1,860.57 × 788.64
  4. Step 4: Simplify right side
    1,348.45x = 1,467,312.95
  5. Step 5: Solve for x
    x = 1,467,312.95/1,348.45
  6. Step 6: Final answer
    x = 1,088.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.