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Finding the Fourth Proportional to 694,345.70, 958,158.53 and 388,362.98

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Solution

The fourth proportional to 694,345.70, 958,158.53 and 388,362.98 is: 535,919.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,345.70 : 958,158.53 = 388,362.98 : x
  2. Step 2: Convert to fraction form
    694,345.70/958,158.53 = 388,362.98/x
  3. Step 3: Cross multiply
    694,345.70x = 958,158.53 × 388,362.98
  4. Step 4: Simplify right side
    694,345.70x = 372,113,295,290.61
  5. Step 5: Solve for x
    x = 372,113,295,290.61/694,345.70
  6. Step 6: Final answer
    x = 535,919.35

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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.