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Finding the Fourth Proportional to 571,295.28, 787,978.08 and 377,478.48

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Solution

The fourth proportional to 571,295.28, 787,978.08 and 377,478.48 is: 520,649.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,295.28 : 787,978.08 = 377,478.48 : x
  2. Step 2: Convert to fraction form
    571,295.28/787,978.08 = 377,478.48/x
  3. Step 3: Cross multiply
    571,295.28x = 787,978.08 × 377,478.48
  4. Step 4: Simplify right side
    571,295.28x = 297,444,767,911.72
  5. Step 5: Solve for x
    x = 297,444,767,911.72/571,295.28
  6. Step 6: Final answer
    x = 520,649.79

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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.