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Finding the Fourth Proportional to 661,334.78, 912,649.29 and 359,528.78

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Solution

The fourth proportional to 661,334.78, 912,649.29 and 359,528.78 is: 496,153.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,334.78 : 912,649.29 = 359,528.78 : x
  2. Step 2: Convert to fraction form
    661,334.78/912,649.29 = 359,528.78/x
  3. Step 3: Cross multiply
    661,334.78x = 912,649.29 × 359,528.78
  4. Step 4: Simplify right side
    661,334.78x = 328,123,685,801.57
  5. Step 5: Solve for x
    x = 328,123,685,801.57/661,334.78
  6. Step 6: Final answer
    x = 496,153.68

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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.