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Finding the Fourth Proportional to 338,873.20, 508,511.40 and 128,532.40

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Solution

The fourth proportional to 338,873.20, 508,511.40 and 128,532.40 is: 192,875.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,873.20 : 508,511.40 = 128,532.40 : x
  2. Step 2: Convert to fraction form
    338,873.20/508,511.40 = 128,532.40/x
  3. Step 3: Cross multiply
    338,873.20x = 508,511.40 × 128,532.40
  4. Step 4: Simplify right side
    338,873.20x = 65,360,190,669.36
  5. Step 5: Solve for x
    x = 65,360,190,669.36/338,873.20
  6. Step 6: Final answer
    x = 192,875.07

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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.