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Finding the Fourth Proportional to 291,695.20, 437,715.60 and 212,610.40

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Solution

The fourth proportional to 291,695.20, 437,715.60 and 212,610.40 is: 319,041.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,695.20 : 437,715.60 = 212,610.40 : x
  2. Step 2: Convert to fraction form
    291,695.20/437,715.60 = 212,610.40/x
  3. Step 3: Cross multiply
    291,695.20x = 437,715.60 × 212,610.40
  4. Step 4: Simplify right side
    291,695.20x = 93,062,888,802.24
  5. Step 5: Solve for x
    x = 93,062,888,802.24/291,695.20
  6. Step 6: Final answer
    x = 319,041.55

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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.