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Finding the Fourth Proportional to 310,393.49, 428,342.58 and 181,420.63

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Solution

The fourth proportional to 310,393.49, 428,342.58 and 181,420.63 is: 250,360.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,393.49 : 428,342.58 = 181,420.63 : x
  2. Step 2: Convert to fraction form
    310,393.49/428,342.58 = 181,420.63/x
  3. Step 3: Cross multiply
    310,393.49x = 428,342.58 × 181,420.63
  4. Step 4: Simplify right side
    310,393.49x = 77,710,179,648.57
  5. Step 5: Solve for x
    x = 77,710,179,648.57/310,393.49
  6. Step 6: Final answer
    x = 250,360.22

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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.