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Finding the Fourth Proportional to 572,516.20, 858,039.90 and 319,796.20

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Solution

The fourth proportional to 572,516.20, 858,039.90 and 319,796.20 is: 479,284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,516.20 : 858,039.90 = 319,796.20 : x
  2. Step 2: Convert to fraction form
    572,516.20/858,039.90 = 319,796.20/x
  3. Step 3: Cross multiply
    572,516.20x = 858,039.90 × 319,796.20
  4. Step 4: Simplify right side
    572,516.20x = 274,397,899,468.38
  5. Step 5: Solve for x
    x = 274,397,899,468.38/572,516.20
  6. Step 6: Final answer
    x = 479,284.08

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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.