Home / 1,128,530.03-1,557,398.34-645,140.15

Finding the Fourth Proportional to 1,128,530.03, 1,557,398.34 and 645,140.15

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Solution

The fourth proportional to 1,128,530.03, 1,557,398.34 and 645,140.15 is: 890,308.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,530.03 : 1,557,398.34 = 645,140.15 : x
  2. Step 2: Convert to fraction form
    1,128,530.03/1,557,398.34 = 645,140.15/x
  3. Step 3: Cross multiply
    1,128,530.03x = 1,557,398.34 × 645,140.15
  4. Step 4: Simplify right side
    1,128,530.03x = 1,004,740,190,890.36
  5. Step 5: Solve for x
    x = 1,004,740,190,890.36/1,128,530.03
  6. Step 6: Final answer
    x = 890,308.78

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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.