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Finding the Fourth Proportional to 403,377.98, 556,833.89 and 287,166.47

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Solution

The fourth proportional to 403,377.98, 556,833.89 and 287,166.47 is: 396,412.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,377.98 : 556,833.89 = 287,166.47 : x
  2. Step 2: Convert to fraction form
    403,377.98/556,833.89 = 287,166.47/x
  3. Step 3: Cross multiply
    403,377.98x = 556,833.89 × 287,166.47
  4. Step 4: Simplify right side
    403,377.98x = 159,904,020,501.42
  5. Step 5: Solve for x
    x = 159,904,020,501.42/403,377.98
  6. Step 6: Final answer
    x = 396,412.37

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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.