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Finding the Fourth Proportional to 312,021.20, 437,935.60 and 312,021.20

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Solution

The fourth proportional to 312,021.20, 437,935.60 and 312,021.20 is: 437,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,021.20 : 437,935.60 = 312,021.20 : x
  2. Step 2: Convert to fraction form
    312,021.20/437,935.60 = 312,021.20/x
  3. Step 3: Cross multiply
    312,021.20x = 437,935.60 × 312,021.20
  4. Step 4: Simplify right side
    312,021.20x = 136,645,191,434.72
  5. Step 5: Solve for x
    x = 136,645,191,434.72/312,021.20
  6. Step 6: Final answer
    x = 437,935.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.