Home / 715,916.72-987,956.20-393,624.02

Finding the Fourth Proportional to 715,916.72, 987,956.20 and 393,624.02

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Solution

The fourth proportional to 715,916.72, 987,956.20 and 393,624.02 is: 543,196.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,916.72 : 987,956.20 = 393,624.02 : x
  2. Step 2: Convert to fraction form
    715,916.72/987,956.20 = 393,624.02/x
  3. Step 3: Cross multiply
    715,916.72x = 987,956.20 × 393,624.02
  4. Step 4: Simplify right side
    715,916.72x = 388,883,291,027.92
  5. Step 5: Solve for x
    x = 388,883,291,027.92/715,916.72
  6. Step 6: Final answer
    x = 543,196.27

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1.5x scale

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.