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Finding the Fourth Proportional to 640,655.72, 961,563.24 and 341,389.16

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Solution

The fourth proportional to 640,655.72, 961,563.24 and 341,389.16 is: 512,392.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,655.72 : 961,563.24 = 341,389.16 : x
  2. Step 2: Convert to fraction form
    640,655.72/961,563.24 = 341,389.16/x
  3. Step 3: Cross multiply
    640,655.72x = 961,563.24 × 341,389.16
  4. Step 4: Simplify right side
    640,655.72x = 328,267,266,790.48
  5. Step 5: Solve for x
    x = 328,267,266,790.48/640,655.72
  6. Step 6: Final answer
    x = 512,392.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.