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Finding the Fourth Proportional to 656,378.16, 905,801.78 and 369,908.48

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Solution

The fourth proportional to 656,378.16, 905,801.78 and 369,908.48 is: 510,473.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,378.16 : 905,801.78 = 369,908.48 : x
  2. Step 2: Convert to fraction form
    656,378.16/905,801.78 = 369,908.48/x
  3. Step 3: Cross multiply
    656,378.16x = 905,801.78 × 369,908.48
  4. Step 4: Simplify right side
    656,378.16x = 335,063,759,621.09
  5. Step 5: Solve for x
    x = 335,063,759,621.09/656,378.16
  6. Step 6: Final answer
    x = 510,473.66

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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.