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Finding the Fourth Proportional to 489,688.20, 734,532.30 and 279,347.40

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Solution

The fourth proportional to 489,688.20, 734,532.30 and 279,347.40 is: 419,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,688.20 : 734,532.30 = 279,347.40 : x
  2. Step 2: Convert to fraction form
    489,688.20/734,532.30 = 279,347.40/x
  3. Step 3: Cross multiply
    489,688.20x = 734,532.30 × 279,347.40
  4. Step 4: Simplify right side
    489,688.20x = 205,189,688,221.02
  5. Step 5: Solve for x
    x = 205,189,688,221.02/489,688.20
  6. Step 6: Final answer
    x = 419,021.10

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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.