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Finding the Fourth Proportional to 539,866.80, 810,290.96 and 287,358.51

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Solution

The fourth proportional to 539,866.80, 810,290.96 and 287,358.51 is: 431,298.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,866.80 : 810,290.96 = 287,358.51 : x
  2. Step 2: Convert to fraction form
    539,866.80/810,290.96 = 287,358.51/x
  3. Step 3: Cross multiply
    539,866.80x = 810,290.96 × 287,358.51
  4. Step 4: Simplify right side
    539,866.80x = 232,844,001,495.28
  5. Step 5: Solve for x
    x = 232,844,001,495.28/539,866.80
  6. Step 6: Final answer
    x = 431,298.98

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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.