Home / 515,934.78-712,055.66-311,987.18

Finding the Fourth Proportional to 515,934.78, 712,055.66 and 311,987.18

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Solution

The fourth proportional to 515,934.78, 712,055.66 and 311,987.18 is: 430,582.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,934.78 : 712,055.66 = 311,987.18 : x
  2. Step 2: Convert to fraction form
    515,934.78/712,055.66 = 311,987.18/x
  3. Step 3: Cross multiply
    515,934.78x = 712,055.66 × 311,987.18
  4. Step 4: Simplify right side
    515,934.78x = 222,152,237,366.44
  5. Step 5: Solve for x
    x = 222,152,237,366.44/515,934.78
  6. Step 6: Final answer
    x = 430,582.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.