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Finding the Fourth Proportional to 515,718.77, 774,087.26 and 387,188.01

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Solution

The fourth proportional to 515,718.77, 774,087.26 and 387,188.01 is: 581,164.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,718.77 : 774,087.26 = 387,188.01 : x
  2. Step 2: Convert to fraction form
    515,718.77/774,087.26 = 387,188.01/x
  3. Step 3: Cross multiply
    515,718.77x = 774,087.26 × 387,188.01
  4. Step 4: Simplify right side
    515,718.77x = 299,717,303,829.81
  5. Step 5: Solve for x
    x = 299,717,303,829.81/515,718.77
  6. Step 6: Final answer
    x = 581,164.24

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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.