Home / 1,430.10-2,143.80-1,284.30

Finding the Fourth Proportional to 1,430.10, 2,143.80 and 1,284.30

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Solution

The fourth proportional to 1,430.10, 2,143.80 and 1,284.30 is: 1,925.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.10 : 2,143.80 = 1,284.30 : x
  2. Step 2: Convert to fraction form
    1,430.10/2,143.80 = 1,284.30/x
  3. Step 3: Cross multiply
    1,430.10x = 2,143.80 × 1,284.30
  4. Step 4: Simplify right side
    1,430.10x = 2,753,282.34
  5. Step 5: Solve for x
    x = 2,753,282.34/1,430.10
  6. Step 6: Final answer
    x = 1,925.24

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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.