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Finding the Fourth Proportional to 291,757, 402,624.90 and 157,621

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Solution

The fourth proportional to 291,757, 402,624.90 and 157,621 is: 217,517.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,757 : 402,624.90 = 157,621 : x
  2. Step 2: Convert to fraction form
    291,757/402,624.90 = 157,621/x
  3. Step 3: Cross multiply
    291,757x = 402,624.90 × 157,621
  4. Step 4: Simplify right side
    291,757x = 63,462,139,362.90
  5. Step 5: Solve for x
    x = 63,462,139,362.90/291,757
  6. Step 6: Final answer
    x = 217,517.11

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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.