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Finding the Fourth Proportional to 385,503.78, 531,921.41 and 249,518.86

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Solution

The fourth proportional to 385,503.78, 531,921.41 and 249,518.86 is: 344,288.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,503.78 : 531,921.41 = 249,518.86 : x
  2. Step 2: Convert to fraction form
    385,503.78/531,921.41 = 249,518.86/x
  3. Step 3: Cross multiply
    385,503.78x = 531,921.41 × 249,518.86
  4. Step 4: Simplify right side
    385,503.78x = 132,724,423,832.79
  5. Step 5: Solve for x
    x = 132,724,423,832.79/385,503.78
  6. Step 6: Final answer
    x = 344,288.26

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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.