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Finding the Fourth Proportional to 903.51, 1,246.86 and 499.75

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Solution

The fourth proportional to 903.51, 1,246.86 and 499.75 is: 689.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.51 : 1,246.86 = 499.75 : x
  2. Step 2: Convert to fraction form
    903.51/1,246.86 = 499.75/x
  3. Step 3: Cross multiply
    903.51x = 1,246.86 × 499.75
  4. Step 4: Simplify right side
    903.51x = 623,114.54
  5. Step 5: Solve for x
    x = 623,114.54/903.51
  6. Step 6: Final answer
    x = 689.66

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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.