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Finding the Fourth Proportional to 572,279.40, 858,807.90 and 319,559.40

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Solution

The fourth proportional to 572,279.40, 858,807.90 and 319,559.40 is: 479,556.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,279.40 : 858,807.90 = 319,559.40 : x
  2. Step 2: Convert to fraction form
    572,279.40/858,807.90 = 319,559.40/x
  3. Step 3: Cross multiply
    572,279.40x = 858,807.90 × 319,559.40
  4. Step 4: Simplify right side
    572,279.40x = 274,440,137,239.26
  5. Step 5: Solve for x
    x = 274,440,137,239.26/572,279.40
  6. Step 6: Final answer
    x = 479,556.20

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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.