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Finding the Fourth Proportional to 693,763.19, 957,437.65 and 387,840.87

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Solution

The fourth proportional to 693,763.19, 957,437.65 and 387,840.87 is: 535,245.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,763.19 : 957,437.65 = 387,840.87 : x
  2. Step 2: Convert to fraction form
    693,763.19/957,437.65 = 387,840.87/x
  3. Step 3: Cross multiply
    693,763.19x = 957,437.65 × 387,840.87
  4. Step 4: Simplify right side
    693,763.19x = 371,333,451,631.56
  5. Step 5: Solve for x
    x = 371,333,451,631.56/693,763.19
  6. Step 6: Final answer
    x = 535,245.25

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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.