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Finding the Fourth Proportional to 570,626.84, 787,464.99 and 315,978.05

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Solution

The fourth proportional to 570,626.84, 787,464.99 and 315,978.05 is: 436,049.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,626.84 : 787,464.99 = 315,978.05 : x
  2. Step 2: Convert to fraction form
    570,626.84/787,464.99 = 315,978.05/x
  3. Step 3: Cross multiply
    570,626.84x = 787,464.99 × 315,978.05
  4. Step 4: Simplify right side
    570,626.84x = 248,821,651,983.47
  5. Step 5: Solve for x
    x = 248,821,651,983.47/570,626.84
  6. Step 6: Final answer
    x = 436,049.68

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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.