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Finding the Fourth Proportional to 570,438.04, 787,213.83 and 312,310.66

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Solution

The fourth proportional to 570,438.04, 787,213.83 and 312,310.66 is: 430,993.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,438.04 : 787,213.83 = 312,310.66 : x
  2. Step 2: Convert to fraction form
    570,438.04/787,213.83 = 312,310.66/x
  3. Step 3: Cross multiply
    570,438.04x = 787,213.83 × 312,310.66
  4. Step 4: Simplify right side
    570,438.04x = 245,855,270,808.43
  5. Step 5: Solve for x
    x = 245,855,270,808.43/570,438.04
  6. Step 6: Final answer
    x = 430,993.82

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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.