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Finding the Fourth Proportional to 1,190.77, 1,642.86 and 693.30

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Solution

The fourth proportional to 1,190.77, 1,642.86 and 693.30 is: 956.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.77 : 1,642.86 = 693.30 : x
  2. Step 2: Convert to fraction form
    1,190.77/1,642.86 = 693.30/x
  3. Step 3: Cross multiply
    1,190.77x = 1,642.86 × 693.30
  4. Step 4: Simplify right side
    1,190.77x = 1,138,994.84
  5. Step 5: Solve for x
    x = 1,138,994.84/1,190.77
  6. Step 6: Final answer
    x = 956.52

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1.5x scale

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.