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Finding the Fourth Proportional to 1,566.40, 2,161.52 and 903.12

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Solution

The fourth proportional to 1,566.40, 2,161.52 and 903.12 is: 1,246.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,566.40 : 2,161.52 = 903.12 : x
  2. Step 2: Convert to fraction form
    1,566.40/2,161.52 = 903.12/x
  3. Step 3: Cross multiply
    1,566.40x = 2,161.52 × 903.12
  4. Step 4: Simplify right side
    1,566.40x = 1,952,111.94
  5. Step 5: Solve for x
    x = 1,952,111.94/1,566.40
  6. Step 6: Final answer
    x = 1,246.24

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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.