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Finding the Fourth Proportional to 317,387.37, 438,116.48 and 215,458.39

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Solution

The fourth proportional to 317,387.37, 438,116.48 and 215,458.39 is: 297,415.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,387.37 : 438,116.48 = 215,458.39 : x
  2. Step 2: Convert to fraction form
    317,387.37/438,116.48 = 215,458.39/x
  3. Step 3: Cross multiply
    317,387.37x = 438,116.48 × 215,458.39
  4. Step 4: Simplify right side
    317,387.37x = 94,395,871,413.27
  5. Step 5: Solve for x
    x = 94,395,871,413.27/317,387.37
  6. Step 6: Final answer
    x = 297,415.34

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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.