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Finding the Fourth Proportional to 287,692.20, 431,538.30 and 287,692.20

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Solution

The fourth proportional to 287,692.20, 431,538.30 and 287,692.20 is: 431,538.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,692.20 : 431,538.30 = 287,692.20 : x
  2. Step 2: Convert to fraction form
    287,692.20/431,538.30 = 287,692.20/x
  3. Step 3: Cross multiply
    287,692.20x = 431,538.30 × 287,692.20
  4. Step 4: Simplify right side
    287,692.20x = 124,150,202,911.26
  5. Step 5: Solve for x
    x = 124,150,202,911.26/287,692.20
  6. Step 6: Final answer
    x = 431,538.30

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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.