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Finding the Fourth Proportional to 438,471.37, 657,725.34 and 138,945.32

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Solution

The fourth proportional to 438,471.37, 657,725.34 and 138,945.32 is: 208,423.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,471.37 : 657,725.34 = 138,945.32 : x
  2. Step 2: Convert to fraction form
    438,471.37/657,725.34 = 138,945.32/x
  3. Step 3: Cross multiply
    438,471.37x = 657,725.34 × 138,945.32
  4. Step 4: Simplify right side
    438,471.37x = 91,387,854,549.78
  5. Step 5: Solve for x
    x = 91,387,854,549.78/438,471.37
  6. Step 6: Final answer
    x = 208,423.77

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1.5x scale

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.