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Finding the Fourth Proportional to 903.69, 1,246.86 and 655.56

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Solution

The fourth proportional to 903.69, 1,246.86 and 655.56 is: 904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.69 : 1,246.86 = 655.56 : x
  2. Step 2: Convert to fraction form
    903.69/1,246.86 = 655.56/x
  3. Step 3: Cross multiply
    903.69x = 1,246.86 × 655.56
  4. Step 4: Simplify right side
    903.69x = 817,391.54
  5. Step 5: Solve for x
    x = 817,391.54/903.69
  6. Step 6: Final answer
    x = 904.50

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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.