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Finding the Fourth Proportional to 1,533.11, 2,115.45 and 903.74

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Solution

The fourth proportional to 1,533.11, 2,115.45 and 903.74 is: 1,247.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,533.11 : 2,115.45 = 903.74 : x
  2. Step 2: Convert to fraction form
    1,533.11/2,115.45 = 903.74/x
  3. Step 3: Cross multiply
    1,533.11x = 2,115.45 × 903.74
  4. Step 4: Simplify right side
    1,533.11x = 1,911,806.21
  5. Step 5: Solve for x
    x = 1,911,806.21/1,533.11
  6. Step 6: Final answer
    x = 1,247.02

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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.