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Finding the Fourth Proportional to 659,137.52, 909,616.95 and 387,216.88

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Solution

The fourth proportional to 659,137.52, 909,616.95 and 387,216.88 is: 534,363.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,137.52 : 909,616.95 = 387,216.88 : x
  2. Step 2: Convert to fraction form
    659,137.52/909,616.95 = 387,216.88/x
  3. Step 3: Cross multiply
    659,137.52x = 909,616.95 × 387,216.88
  4. Step 4: Simplify right side
    659,137.52x = 352,219,035,100.07
  5. Step 5: Solve for x
    x = 352,219,035,100.07/659,137.52
  6. Step 6: Final answer
    x = 534,363.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.