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Finding the Fourth Proportional to 468,355.08, 646,345.66 and 287,031.98

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Solution

The fourth proportional to 468,355.08, 646,345.66 and 287,031.98 is: 396,113.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,355.08 : 646,345.66 = 287,031.98 : x
  2. Step 2: Convert to fraction form
    468,355.08/646,345.66 = 287,031.98/x
  3. Step 3: Cross multiply
    468,355.08x = 646,345.66 × 287,031.98
  4. Step 4: Simplify right side
    468,355.08x = 185,521,874,554.21
  5. Step 5: Solve for x
    x = 185,521,874,554.21/468,355.08
  6. Step 6: Final answer
    x = 396,113.72

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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.