Home / 1,128,455.72-1,557,268.72-645,031.24

Finding the Fourth Proportional to 1,128,455.72, 1,557,268.72 and 645,031.24

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Solution

The fourth proportional to 1,128,455.72, 1,557,268.72 and 645,031.24 is: 890,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,455.72 : 1,557,268.72 = 645,031.24 : x
  2. Step 2: Convert to fraction form
    1,128,455.72/1,557,268.72 = 645,031.24/x
  3. Step 3: Cross multiply
    1,128,455.72x = 1,557,268.72 × 645,031.24
  4. Step 4: Simplify right side
    1,128,455.72x = 1,004,486,973,474.81
  5. Step 5: Solve for x
    x = 1,004,486,973,474.81/1,128,455.72
  6. Step 6: Final answer
    x = 890,143.01

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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.