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Finding the Fourth Proportional to 570,473.25, 787,223.15 and 312,300.70

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Solution

The fourth proportional to 570,473.25, 787,223.15 and 312,300.70 is: 430,958.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,473.25 : 787,223.15 = 312,300.70 : x
  2. Step 2: Convert to fraction form
    570,473.25/787,223.15 = 312,300.70/x
  3. Step 3: Cross multiply
    570,473.25x = 787,223.15 × 312,300.70
  4. Step 4: Simplify right side
    570,473.25x = 245,850,340,801.21
  5. Step 5: Solve for x
    x = 245,850,340,801.21/570,473.25
  6. Step 6: Final answer
    x = 430,958.58

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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.