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Finding the Fourth Proportional to 489,688.80, 734,533.20 and 486,578.40

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Solution

The fourth proportional to 489,688.80, 734,533.20 and 486,578.40 is: 729,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,688.80 : 734,533.20 = 486,578.40 : x
  2. Step 2: Convert to fraction form
    489,688.80/734,533.20 = 486,578.40/x
  3. Step 3: Cross multiply
    489,688.80x = 734,533.20 × 486,578.40
  4. Step 4: Simplify right side
    489,688.80x = 357,407,989,202.88
  5. Step 5: Solve for x
    x = 357,407,989,202.88/489,688.80
  6. Step 6: Final answer
    x = 729,867.60

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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.