Home / 515,935.03-712,056.01-311,987.43

Finding the Fourth Proportional to 515,935.03, 712,056.01 and 311,987.43

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Solution

The fourth proportional to 515,935.03, 712,056.01 and 311,987.43 is: 430,582.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,935.03 : 712,056.01 = 311,987.43 : x
  2. Step 2: Convert to fraction form
    515,935.03/712,056.01 = 311,987.43/x
  3. Step 3: Cross multiply
    515,935.03x = 712,056.01 × 311,987.43
  4. Step 4: Simplify right side
    515,935.03x = 222,152,523,795.99
  5. Step 5: Solve for x
    x = 222,152,523,795.99/515,935.03
  6. Step 6: Final answer
    x = 430,582.36

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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.