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Finding the Fourth Proportional to 570,555.36, 787,410.72 and 315,930.24

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Solution

The fourth proportional to 570,555.36, 787,410.72 and 315,930.24 is: 436,008.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,555.36 : 787,410.72 = 315,930.24 : x
  2. Step 2: Convert to fraction form
    570,555.36/787,410.72 = 315,930.24/x
  3. Step 3: Cross multiply
    570,555.36x = 787,410.72 × 315,930.24
  4. Step 4: Simplify right side
    570,555.36x = 248,766,857,748.17
  5. Step 5: Solve for x
    x = 248,766,857,748.17/570,555.36
  6. Step 6: Final answer
    x = 436,008.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.