Home / 1,430.10-2,145.24-552.78

Finding the Fourth Proportional to 1,430.10, 2,145.24 and 552.78

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Solution

The fourth proportional to 1,430.10, 2,145.24 and 552.78 is: 829.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.10 : 2,145.24 = 552.78 : x
  2. Step 2: Convert to fraction form
    1,430.10/2,145.24 = 552.78/x
  3. Step 3: Cross multiply
    1,430.10x = 2,145.24 × 552.78
  4. Step 4: Simplify right side
    1,430.10x = 1,185,845.77
  5. Step 5: Solve for x
    x = 1,185,845.77/1,430.10
  6. Step 6: Final answer
    x = 829.20

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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.