Home / 515,719.77-774,088.76-387,189.01

Finding the Fourth Proportional to 515,719.77, 774,088.76 and 387,189.01

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Solution

The fourth proportional to 515,719.77, 774,088.76 and 387,189.01 is: 581,165.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,719.77 : 774,088.76 = 387,189.01 : x
  2. Step 2: Convert to fraction form
    515,719.77/774,088.76 = 387,189.01/x
  3. Step 3: Cross multiply
    515,719.77x = 774,088.76 × 387,189.01
  4. Step 4: Simplify right side
    515,719.77x = 299,718,660,636.53
  5. Step 5: Solve for x
    x = 299,718,660,636.53/515,719.77
  6. Step 6: Final answer
    x = 581,165.74

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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.