Home / 515,316.36-711,142.02-288,957

Finding the Fourth Proportional to 515,316.36, 711,142.02 and 288,957

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Solution

The fourth proportional to 515,316.36, 711,142.02 and 288,957 is: 398,763.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,316.36 : 711,142.02 = 288,957 : x
  2. Step 2: Convert to fraction form
    515,316.36/711,142.02 = 288,957/x
  3. Step 3: Cross multiply
    515,316.36x = 711,142.02 × 288,957
  4. Step 4: Simplify right side
    515,316.36x = 205,489,464,673.14
  5. Step 5: Solve for x
    x = 205,489,464,673.14/515,316.36
  6. Step 6: Final answer
    x = 398,763.71

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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.