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Finding the Fourth Proportional to 1,303.12, 1,953.80 and 752.80

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Solution

The fourth proportional to 1,303.12, 1,953.80 and 752.80 is: 1,128.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.12 : 1,953.80 = 752.80 : x
  2. Step 2: Convert to fraction form
    1,303.12/1,953.80 = 752.80/x
  3. Step 3: Cross multiply
    1,303.12x = 1,953.80 × 752.80
  4. Step 4: Simplify right side
    1,303.12x = 1,470,820.64
  5. Step 5: Solve for x
    x = 1,470,820.64/1,303.12
  6. Step 6: Final answer
    x = 1,128.69

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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.