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Finding the Fourth Proportional to 489,190.40, 732,619.20 and 489,190.40

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Solution

The fourth proportional to 489,190.40, 732,619.20 and 489,190.40 is: 732,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,190.40 : 732,619.20 = 489,190.40 : x
  2. Step 2: Convert to fraction form
    489,190.40/732,619.20 = 489,190.40/x
  3. Step 3: Cross multiply
    489,190.40x = 732,619.20 × 489,190.40
  4. Step 4: Simplify right side
    489,190.40x = 358,390,279,495.68
  5. Step 5: Solve for x
    x = 358,390,279,495.68/489,190.40
  6. Step 6: Final answer
    x = 732,619.20

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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.