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Finding the Fourth Proportional to 519,407.40, 778,880.70 and 238,780.20

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Solution

The fourth proportional to 519,407.40, 778,880.70 and 238,780.20 is: 358,064.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,407.40 : 778,880.70 = 238,780.20 : x
  2. Step 2: Convert to fraction form
    519,407.40/778,880.70 = 238,780.20/x
  3. Step 3: Cross multiply
    519,407.40x = 778,880.70 × 238,780.20
  4. Step 4: Simplify right side
    519,407.40x = 185,981,289,322.14
  5. Step 5: Solve for x
    x = 185,981,289,322.14/519,407.40
  6. Step 6: Final answer
    x = 358,064.38

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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.