Home / 811,811.31-1,217,691.85-385,653.91

Finding the Fourth Proportional to 811,811.31, 1,217,691.85 and 385,653.91

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Solution

The fourth proportional to 811,811.31, 1,217,691.85 and 385,653.91 is: 578,468.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,811.31 : 1,217,691.85 = 385,653.91 : x
  2. Step 2: Convert to fraction form
    811,811.31/1,217,691.85 = 385,653.91/x
  3. Step 3: Cross multiply
    811,811.31x = 1,217,691.85 × 385,653.91
  4. Step 4: Simplify right side
    811,811.31x = 469,607,623,127.63
  5. Step 5: Solve for x
    x = 469,607,623,127.63/811,811.31
  6. Step 6: Final answer
    x = 578,468.93

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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.