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Finding the Fourth Proportional to 426,753.52, 640,532 and 216,542.32

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Solution

The fourth proportional to 426,753.52, 640,532 and 216,542.32 is: 325,017.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,753.52 : 640,532 = 216,542.32 : x
  2. Step 2: Convert to fraction form
    426,753.52/640,532 = 216,542.32/x
  3. Step 3: Cross multiply
    426,753.52x = 640,532 × 216,542.32
  4. Step 4: Simplify right side
    426,753.52x = 138,702,285,314.24
  5. Step 5: Solve for x
    x = 138,702,285,314.24/426,753.52
  6. Step 6: Final answer
    x = 325,017.32

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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.