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Finding the Fourth Proportional to 520,305.43, 779,184.36 and 429,794.38

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Solution

The fourth proportional to 520,305.43, 779,184.36 and 429,794.38 is: 643,639.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,305.43 : 779,184.36 = 429,794.38 : x
  2. Step 2: Convert to fraction form
    520,305.43/779,184.36 = 429,794.38/x
  3. Step 3: Cross multiply
    520,305.43x = 779,184.36 × 429,794.38
  4. Step 4: Simplify right side
    520,305.43x = 334,889,058,911.90
  5. Step 5: Solve for x
    x = 334,889,058,911.90/520,305.43
  6. Step 6: Final answer
    x = 643,639.37

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1.5x scale

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.