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Finding the Fourth Proportional to 401,395.35, 553,838.88 and 231,531.06

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Solution

The fourth proportional to 401,395.35, 553,838.88 and 231,531.06 is: 319,462.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,395.35 : 553,838.88 = 231,531.06 : x
  2. Step 2: Convert to fraction form
    401,395.35/553,838.88 = 231,531.06/x
  3. Step 3: Cross multiply
    401,395.35x = 553,838.88 × 231,531.06
  4. Step 4: Simplify right side
    401,395.35x = 128,230,902,955.61
  5. Step 5: Solve for x
    x = 128,230,902,955.61/401,395.35
  6. Step 6: Final answer
    x = 319,462.85

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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.