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Finding the Fourth Proportional to 325,124.20, 487,686.30 and 212,931.10

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Solution

The fourth proportional to 325,124.20, 487,686.30 and 212,931.10 is: 319,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,124.20 : 487,686.30 = 212,931.10 : x
  2. Step 2: Convert to fraction form
    325,124.20/487,686.30 = 212,931.10/x
  3. Step 3: Cross multiply
    325,124.20x = 487,686.30 × 212,931.10
  4. Step 4: Simplify right side
    325,124.20x = 103,843,580,313.93
  5. Step 5: Solve for x
    x = 103,843,580,313.93/325,124.20
  6. Step 6: Final answer
    x = 319,396.65

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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.