Home / 4,752.20-7,128.30-1,289.45

Finding the Fourth Proportional to 4,752.20, 7,128.30 and 1,289.45

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Solution

The fourth proportional to 4,752.20, 7,128.30 and 1,289.45 is: 1,934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.20 : 7,128.30 = 1,289.45 : x
  2. Step 2: Convert to fraction form
    4,752.20/7,128.30 = 1,289.45/x
  3. Step 3: Cross multiply
    4,752.20x = 7,128.30 × 1,289.45
  4. Step 4: Simplify right side
    4,752.20x = 9,191,568.61
  5. Step 5: Solve for x
    x = 9,191,568.61/4,752.20
  6. Step 6: Final answer
    x = 1,934.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.