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Finding the Fourth Proportional to 338,847.60, 508,271.40 and 128,474.40

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Solution

The fourth proportional to 338,847.60, 508,271.40 and 128,474.40 is: 192,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,847.60 : 508,271.40 = 128,474.40 : x
  2. Step 2: Convert to fraction form
    338,847.60/508,271.40 = 128,474.40/x
  3. Step 3: Cross multiply
    338,847.60x = 508,271.40 × 128,474.40
  4. Step 4: Simplify right side
    338,847.60x = 65,299,863,152.16
  5. Step 5: Solve for x
    x = 65,299,863,152.16/338,847.60
  6. Step 6: Final answer
    x = 192,711.60

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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.