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Finding the Fourth Proportional to 489,637.60, 734,456.40 and 279,685.60

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Solution

The fourth proportional to 489,637.60, 734,456.40 and 279,685.60 is: 419,528.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,637.60 : 734,456.40 = 279,685.60 : x
  2. Step 2: Convert to fraction form
    489,637.60/734,456.40 = 279,685.60/x
  3. Step 3: Cross multiply
    489,637.60x = 734,456.40 × 279,685.60
  4. Step 4: Simplify right side
    489,637.60x = 205,416,878,907.84
  5. Step 5: Solve for x
    x = 205,416,878,907.84/489,637.60
  6. Step 6: Final answer
    x = 419,528.40

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Similar ratio
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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.