Home / 811,800.71-1,217,675.94-385,643.25

Finding the Fourth Proportional to 811,800.71, 1,217,675.94 and 385,643.25

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Solution

The fourth proportional to 811,800.71, 1,217,675.94 and 385,643.25 is: 578,452.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,800.71 : 1,217,675.94 = 385,643.25 : x
  2. Step 2: Convert to fraction form
    811,800.71/1,217,675.94 = 385,643.25/x
  3. Step 3: Cross multiply
    811,800.71x = 1,217,675.94 × 385,643.25
  4. Step 4: Simplify right side
    811,800.71x = 469,588,506,948.41
  5. Step 5: Solve for x
    x = 469,588,506,948.41/811,800.71
  6. Step 6: Final answer
    x = 578,452.94

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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.