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Finding the Fourth Proportional to 404,534.71, 558,017.40 and 261,379.18

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Solution

The fourth proportional to 404,534.71, 558,017.40 and 261,379.18 is: 360,547.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,534.71 : 558,017.40 = 261,379.18 : x
  2. Step 2: Convert to fraction form
    404,534.71/558,017.40 = 261,379.18/x
  3. Step 3: Cross multiply
    404,534.71x = 558,017.40 × 261,379.18
  4. Step 4: Simplify right side
    404,534.71x = 145,854,130,437.73
  5. Step 5: Solve for x
    x = 145,854,130,437.73/404,534.71
  6. Step 6: Final answer
    x = 360,547.88

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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.