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Finding the Fourth Proportional to 290,223.27, 435,502.98 and 121,728.60

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Solution

The fourth proportional to 290,223.27, 435,502.98 and 121,728.60 is: 182,663.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,223.27 : 435,502.98 = 121,728.60 : x
  2. Step 2: Convert to fraction form
    290,223.27/435,502.98 = 121,728.60/x
  3. Step 3: Cross multiply
    290,223.27x = 435,502.98 × 121,728.60
  4. Step 4: Simplify right side
    290,223.27x = 53,013,168,051.23
  5. Step 5: Solve for x
    x = 53,013,168,051.23/290,223.27
  6. Step 6: Final answer
    x = 182,663.40

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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.