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Finding the Fourth Proportional to 519,987, 779,881.86 and 253,479.48

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Solution

The fourth proportional to 519,987, 779,881.86 and 253,479.48 is: 380,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,987 : 779,881.86 = 253,479.48 : x
  2. Step 2: Convert to fraction form
    519,987/779,881.86 = 253,479.48/x
  3. Step 3: Cross multiply
    519,987x = 779,881.86 × 253,479.48
  4. Step 4: Simplify right side
    519,987x = 197,684,048,334.23
  5. Step 5: Solve for x
    x = 197,684,048,334.23/519,987
  6. Step 6: Final answer
    x = 380,171.14

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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.