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Finding the Fourth Proportional to 495,269.80, 742,904.70 and 121,292.80

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Solution

The fourth proportional to 495,269.80, 742,904.70 and 121,292.80 is: 181,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,269.80 : 742,904.70 = 121,292.80 : x
  2. Step 2: Convert to fraction form
    495,269.80/742,904.70 = 121,292.80/x
  3. Step 3: Cross multiply
    495,269.80x = 742,904.70 × 121,292.80
  4. Step 4: Simplify right side
    495,269.80x = 90,108,991,196.16
  5. Step 5: Solve for x
    x = 90,108,991,196.16/495,269.80
  6. Step 6: Final answer
    x = 181,939.20

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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.