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Finding the Fourth Proportional to 570,478.56, 787,289.40 and 328,800.48

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Solution

The fourth proportional to 570,478.56, 787,289.40 and 328,800.48 is: 453,761.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,478.56 : 787,289.40 = 328,800.48 : x
  2. Step 2: Convert to fraction form
    570,478.56/787,289.40 = 328,800.48/x
  3. Step 3: Cross multiply
    570,478.56x = 787,289.40 × 328,800.48
  4. Step 4: Simplify right side
    570,478.56x = 258,861,132,618.91
  5. Step 5: Solve for x
    x = 258,861,132,618.91/570,478.56
  6. Step 6: Final answer
    x = 453,761.37

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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.