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Finding the Fourth Proportional to 338,493.60, 507,934.80 and 128,282.40

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Solution

The fourth proportional to 338,493.60, 507,934.80 and 128,282.40 is: 192,497.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,493.60 : 507,934.80 = 128,282.40 : x
  2. Step 2: Convert to fraction form
    338,493.60/507,934.80 = 128,282.40/x
  3. Step 3: Cross multiply
    338,493.60x = 507,934.80 × 128,282.40
  4. Step 4: Simplify right side
    338,493.60x = 65,159,095,187.52
  5. Step 5: Solve for x
    x = 65,159,095,187.52/338,493.60
  6. Step 6: Final answer
    x = 192,497.27

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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.