Home / 1,551.12-2,140.80-1,457.40

Finding the Fourth Proportional to 1,551.12, 2,140.80 and 1,457.40

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Solution

The fourth proportional to 1,551.12, 2,140.80 and 1,457.40 is: 2,011.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.12 : 2,140.80 = 1,457.40 : x
  2. Step 2: Convert to fraction form
    1,551.12/2,140.80 = 1,457.40/x
  3. Step 3: Cross multiply
    1,551.12x = 2,140.80 × 1,457.40
  4. Step 4: Simplify right side
    1,551.12x = 3,120,001.92
  5. Step 5: Solve for x
    x = 3,120,001.92/1,551.12
  6. Step 6: Final answer
    x = 2,011.45

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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.