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Finding the Fourth Proportional to 315,218.69, 435,001.20 and 171,978.83

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Solution

The fourth proportional to 315,218.69, 435,001.20 and 171,978.83 is: 237,330.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,218.69 : 435,001.20 = 171,978.83 : x
  2. Step 2: Convert to fraction form
    315,218.69/435,001.20 = 171,978.83/x
  3. Step 3: Cross multiply
    315,218.69x = 435,001.20 × 171,978.83
  4. Step 4: Simplify right side
    315,218.69x = 74,810,997,424.60
  5. Step 5: Solve for x
    x = 74,810,997,424.60/315,218.69
  6. Step 6: Final answer
    x = 237,330.46

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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.