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Finding the Fourth Proportional to 212,695.20, 287,760.60 and 212,695.20

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Solution

The fourth proportional to 212,695.20, 287,760.60 and 212,695.20 is: 287,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,695.20 : 287,760.60 = 212,695.20 : x
  2. Step 2: Convert to fraction form
    212,695.20/287,760.60 = 212,695.20/x
  3. Step 3: Cross multiply
    212,695.20x = 287,760.60 × 212,695.20
  4. Step 4: Simplify right side
    212,695.20x = 61,205,298,369.12
  5. Step 5: Solve for x
    x = 61,205,298,369.12/212,695.20
  6. Step 6: Final answer
    x = 287,760.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.