Home / 418,109.85-576,420.30-287,283.51

Finding the Fourth Proportional to 418,109.85, 576,420.30 and 287,283.51

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Solution

The fourth proportional to 418,109.85, 576,420.30 and 287,283.51 is: 396,058.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,109.85 : 576,420.30 = 287,283.51 : x
  2. Step 2: Convert to fraction form
    418,109.85/576,420.30 = 287,283.51/x
  3. Step 3: Cross multiply
    418,109.85x = 576,420.30 × 287,283.51
  4. Step 4: Simplify right side
    418,109.85x = 165,596,047,019.25
  5. Step 5: Solve for x
    x = 165,596,047,019.25/418,109.85
  6. Step 6: Final answer
    x = 396,058.71

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1.5x scale

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.