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Finding the Fourth Proportional to 290,418.20, 435,627.30 and 282,642.20

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Solution

The fourth proportional to 290,418.20, 435,627.30 and 282,642.20 is: 423,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,418.20 : 435,627.30 = 282,642.20 : x
  2. Step 2: Convert to fraction form
    290,418.20/435,627.30 = 282,642.20/x
  3. Step 3: Cross multiply
    290,418.20x = 435,627.30 × 282,642.20
  4. Step 4: Simplify right side
    290,418.20x = 123,126,658,452.06
  5. Step 5: Solve for x
    x = 123,126,658,452.06/290,418.20
  6. Step 6: Final answer
    x = 423,963.30

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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.