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Finding the Fourth Proportional to 570,810.90, 787,709.10 and 312,692.97

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Solution

The fourth proportional to 570,810.90, 787,709.10 and 312,692.97 is: 431,510.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,810.90 : 787,709.10 = 312,692.97 : x
  2. Step 2: Convert to fraction form
    570,810.90/787,709.10 = 312,692.97/x
  3. Step 3: Cross multiply
    570,810.90x = 787,709.10 × 312,692.97
  4. Step 4: Simplify right side
    570,810.90x = 246,311,100,342.64
  5. Step 5: Solve for x
    x = 246,311,100,342.64/570,810.90
  6. Step 6: Final answer
    x = 431,510.85

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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.