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Finding the Fourth Proportional to 369,431.78, 553,148.21 and 191,564.88

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Solution

The fourth proportional to 369,431.78, 553,148.21 and 191,564.88 is: 286,829.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,431.78 : 553,148.21 = 191,564.88 : x
  2. Step 2: Convert to fraction form
    369,431.78/553,148.21 = 191,564.88/x
  3. Step 3: Cross multiply
    369,431.78x = 553,148.21 × 191,564.88
  4. Step 4: Simplify right side
    369,431.78x = 105,963,769,513.04
  5. Step 5: Solve for x
    x = 105,963,769,513.04/369,431.78
  6. Step 6: Final answer
    x = 286,829.06

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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.