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Finding the Fourth Proportional to 243,518.40, 365,335.20 and 77,306.40

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Solution

The fourth proportional to 243,518.40, 365,335.20 and 77,306.40 is: 115,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,518.40 : 365,335.20 = 77,306.40 : x
  2. Step 2: Convert to fraction form
    243,518.40/365,335.20 = 77,306.40/x
  3. Step 3: Cross multiply
    243,518.40x = 365,335.20 × 77,306.40
  4. Step 4: Simplify right side
    243,518.40x = 28,242,749,105.28
  5. Step 5: Solve for x
    x = 28,242,749,105.28/243,518.40
  6. Step 6: Final answer
    x = 115,977.89

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1.5x scale

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.