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Finding the Fourth Proportional to 478,924.12, 661,075.43 and 285,392.53

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Solution

The fourth proportional to 478,924.12, 661,075.43 and 285,392.53 is: 393,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,924.12 : 661,075.43 = 285,392.53 : x
  2. Step 2: Convert to fraction form
    478,924.12/661,075.43 = 285,392.53/x
  3. Step 3: Cross multiply
    478,924.12x = 661,075.43 × 285,392.53
  4. Step 4: Simplify right side
    478,924.12x = 188,665,991,043.27
  5. Step 5: Solve for x
    x = 188,665,991,043.27/478,924.12
  6. Step 6: Final answer
    x = 393,937.13

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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.