Home / 811,681.47-1,217,575.67-212,657.31

Finding the Fourth Proportional to 811,681.47, 1,217,575.67 and 212,657.31

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Solution

The fourth proportional to 811,681.47, 1,217,575.67 and 212,657.31 is: 318,999.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,681.47 : 1,217,575.67 = 212,657.31 : x
  2. Step 2: Convert to fraction form
    811,681.47/1,217,575.67 = 212,657.31/x
  3. Step 3: Cross multiply
    811,681.47x = 1,217,575.67 × 212,657.31
  4. Step 4: Simplify right side
    811,681.47x = 258,926,365,640.36
  5. Step 5: Solve for x
    x = 258,926,365,640.36/811,681.47
  6. Step 6: Final answer
    x = 318,999.97

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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.