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Finding the Fourth Proportional to 309,596.50, 464,472.78 and 87,980.50

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Solution

The fourth proportional to 309,596.50, 464,472.78 and 87,980.50 is: 131,992.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,596.50 : 464,472.78 = 87,980.50 : x
  2. Step 2: Convert to fraction form
    309,596.50/464,472.78 = 87,980.50/x
  3. Step 3: Cross multiply
    309,596.50x = 464,472.78 × 87,980.50
  4. Step 4: Simplify right side
    309,596.50x = 40,864,547,420.79
  5. Step 5: Solve for x
    x = 40,864,547,420.79/309,596.50
  6. Step 6: Final answer
    x = 131,992.92

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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.