Home / 551,631.70-761,205.09-309,895.30

Finding the Fourth Proportional to 551,631.70, 761,205.09 and 309,895.30

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Solution

The fourth proportional to 551,631.70, 761,205.09 and 309,895.30 is: 427,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,631.70 : 761,205.09 = 309,895.30 : x
  2. Step 2: Convert to fraction form
    551,631.70/761,205.09 = 309,895.30/x
  3. Step 3: Cross multiply
    551,631.70x = 761,205.09 × 309,895.30
  4. Step 4: Simplify right side
    551,631.70x = 235,893,879,727.08
  5. Step 5: Solve for x
    x = 235,893,879,727.08/551,631.70
  6. Step 6: Final answer
    x = 427,629.30

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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.