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Finding the Fourth Proportional to 489,664.60, 734,496.90 and 265,715.80

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Solution

The fourth proportional to 489,664.60, 734,496.90 and 265,715.80 is: 398,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,664.60 : 734,496.90 = 265,715.80 : x
  2. Step 2: Convert to fraction form
    489,664.60/734,496.90 = 265,715.80/x
  3. Step 3: Cross multiply
    489,664.60x = 734,496.90 × 265,715.80
  4. Step 4: Simplify right side
    489,664.60x = 195,167,431,381.02
  5. Step 5: Solve for x
    x = 195,167,431,381.02/489,664.60
  6. Step 6: Final answer
    x = 398,573.70

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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.