Home / 1,128,918.12-1,557,825.66-645,503.64

Finding the Fourth Proportional to 1,128,918.12, 1,557,825.66 and 645,503.64

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Solution

The fourth proportional to 1,128,918.12, 1,557,825.66 and 645,503.64 is: 890,748.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,918.12 : 1,557,825.66 = 645,503.64 : x
  2. Step 2: Convert to fraction form
    1,128,918.12/1,557,825.66 = 645,503.64/x
  3. Step 3: Cross multiply
    1,128,918.12x = 1,557,825.66 × 645,503.64
  4. Step 4: Simplify right side
    1,128,918.12x = 1,005,582,134,015.40
  5. Step 5: Solve for x
    x = 1,005,582,134,015.40/1,128,918.12
  6. Step 6: Final answer
    x = 890,748.51

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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.