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Finding the Fourth Proportional to 495,420.35, 742,940.37 and 210,930.53

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Solution

The fourth proportional to 495,420.35, 742,940.37 and 210,930.53 is: 316,314.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,420.35 : 742,940.37 = 210,930.53 : x
  2. Step 2: Convert to fraction form
    495,420.35/742,940.37 = 210,930.53/x
  3. Step 3: Cross multiply
    495,420.35x = 742,940.37 × 210,930.53
  4. Step 4: Simplify right side
    495,420.35x = 156,708,802,287.79
  5. Step 5: Solve for x
    x = 156,708,802,287.79/495,420.35
  6. Step 6: Final answer
    x = 316,314.83

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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.