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Finding the Fourth Proportional to 568,728, 785,073.60 and 387,622.94

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Solution

The fourth proportional to 568,728, 785,073.60 and 387,622.94 is: 535,075.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,728 : 785,073.60 = 387,622.94 : x
  2. Step 2: Convert to fraction form
    568,728/785,073.60 = 387,622.94/x
  3. Step 3: Cross multiply
    568,728x = 785,073.60 × 387,622.94
  4. Step 4: Simplify right side
    568,728x = 304,312,533,023.02
  5. Step 5: Solve for x
    x = 304,312,533,023.02/568,728
  6. Step 6: Final answer
    x = 535,075.70

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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.