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Finding the Fourth Proportional to 330,421.78, 495,127.99 and 245,772.53

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Solution

The fourth proportional to 330,421.78, 495,127.99 and 245,772.53 is: 368,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,421.78 : 495,127.99 = 245,772.53 : x
  2. Step 2: Convert to fraction form
    330,421.78/495,127.99 = 245,772.53/x
  3. Step 3: Cross multiply
    330,421.78x = 495,127.99 × 245,772.53
  4. Step 4: Simplify right side
    330,421.78x = 121,688,858,464.42
  5. Step 5: Solve for x
    x = 121,688,858,464.42/330,421.78
  6. Step 6: Final answer
    x = 368,283.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.