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Finding the Fourth Proportional to 543,728.16, 750,403.71 and 328,986.63

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Solution

The fourth proportional to 543,728.16, 750,403.71 and 328,986.63 is: 454,037.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,728.16 : 750,403.71 = 328,986.63 : x
  2. Step 2: Convert to fraction form
    543,728.16/750,403.71 = 328,986.63/x
  3. Step 3: Cross multiply
    543,728.16x = 750,403.71 × 328,986.63
  4. Step 4: Simplify right side
    543,728.16x = 246,872,787,692.40
  5. Step 5: Solve for x
    x = 246,872,787,692.40/543,728.16
  6. Step 6: Final answer
    x = 454,037.16

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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.