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Finding the Fourth Proportional to 659,453.47, 988,663.43 and 260,392.95

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Solution

The fourth proportional to 659,453.47, 988,663.43 and 260,392.95 is: 390,385.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,453.47 : 988,663.43 = 260,392.95 : x
  2. Step 2: Convert to fraction form
    659,453.47/988,663.43 = 260,392.95/x
  3. Step 3: Cross multiply
    659,453.47x = 988,663.43 × 260,392.95
  4. Step 4: Simplify right side
    659,453.47x = 257,440,987,745.80
  5. Step 5: Solve for x
    x = 257,440,987,745.80/659,453.47
  6. Step 6: Final answer
    x = 390,385.37

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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.