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Finding the Fourth Proportional to 661,335.78, 912,650.67 and 359,529.78

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Solution

The fourth proportional to 661,335.78, 912,650.67 and 359,529.78 is: 496,155.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,335.78 : 912,650.67 = 359,529.78 : x
  2. Step 2: Convert to fraction form
    661,335.78/912,650.67 = 359,529.78/x
  3. Step 3: Cross multiply
    661,335.78x = 912,650.67 × 359,529.78
  4. Step 4: Simplify right side
    661,335.78x = 328,125,094,601.95
  5. Step 5: Solve for x
    x = 328,125,094,601.95/661,335.78
  6. Step 6: Final answer
    x = 496,155.06

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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.