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Finding the Fourth Proportional to 489,980.40, 734,581.80 and 268,364.40

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Solution

The fourth proportional to 489,980.40, 734,581.80 and 268,364.40 is: 402,333.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,980.40 : 734,581.80 = 268,364.40 : x
  2. Step 2: Convert to fraction form
    489,980.40/734,581.80 = 268,364.40/x
  3. Step 3: Cross multiply
    489,980.40x = 734,581.80 × 268,364.40
  4. Step 4: Simplify right side
    489,980.40x = 197,135,604,007.92
  5. Step 5: Solve for x
    x = 197,135,604,007.92/489,980.40
  6. Step 6: Final answer
    x = 402,333.65

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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.