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Finding the Fourth Proportional to 572,579.90, 858,869.85 and 520,091.90

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Solution

The fourth proportional to 572,579.90, 858,869.85 and 520,091.90 is: 780,137.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,579.90 : 858,869.85 = 520,091.90 : x
  2. Step 2: Convert to fraction form
    572,579.90/858,869.85 = 520,091.90/x
  3. Step 3: Cross multiply
    572,579.90x = 858,869.85 × 520,091.90
  4. Step 4: Simplify right side
    572,579.90x = 446,691,252,139.22
  5. Step 5: Solve for x
    x = 446,691,252,139.22/572,579.90
  6. Step 6: Final answer
    x = 780,137.85

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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.