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Finding the Fourth Proportional to 358,854.72, 495,182.40 and 221,011.68

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Solution

The fourth proportional to 358,854.72, 495,182.40 and 221,011.68 is: 304,973.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,854.72 : 495,182.40 = 221,011.68 : x
  2. Step 2: Convert to fraction form
    358,854.72/495,182.40 = 221,011.68/x
  3. Step 3: Cross multiply
    358,854.72x = 495,182.40 × 221,011.68
  4. Step 4: Simplify right side
    358,854.72x = 109,441,094,130.43
  5. Step 5: Solve for x
    x = 109,441,094,130.43/358,854.72
  6. Step 6: Final answer
    x = 304,973.26

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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.