Home / 1,530.80-2,112.36-1,059.20

Finding the Fourth Proportional to 1,530.80, 2,112.36 and 1,059.20

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Solution

The fourth proportional to 1,530.80, 2,112.36 and 1,059.20 is: 1,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.80 : 2,112.36 = 1,059.20 : x
  2. Step 2: Convert to fraction form
    1,530.80/2,112.36 = 1,059.20/x
  3. Step 3: Cross multiply
    1,530.80x = 2,112.36 × 1,059.20
  4. Step 4: Simplify right side
    1,530.80x = 2,237,411.71
  5. Step 5: Solve for x
    x = 2,237,411.71/1,530.80
  6. Step 6: Final answer
    x = 1,461.60

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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.