Home / 421,304.18-631,991.07-136,988.28

Finding the Fourth Proportional to 421,304.18, 631,991.07 and 136,988.28

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Solution

The fourth proportional to 421,304.18, 631,991.07 and 136,988.28 is: 205,493.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,304.18 : 631,991.07 = 136,988.28 : x
  2. Step 2: Convert to fraction form
    421,304.18/631,991.07 = 136,988.28/x
  3. Step 3: Cross multiply
    421,304.18x = 631,991.07 × 136,988.28
  4. Step 4: Simplify right side
    421,304.18x = 86,575,369,654.66
  5. Step 5: Solve for x
    x = 86,575,369,654.66/421,304.18
  6. Step 6: Final answer
    x = 205,493.74

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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.