Home / 811,483.80-1,217,225.70-212,443.80

Finding the Fourth Proportional to 811,483.80, 1,217,225.70 and 212,443.80

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Solution

The fourth proportional to 811,483.80, 1,217,225.70 and 212,443.80 is: 318,665.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,483.80 : 1,217,225.70 = 212,443.80 : x
  2. Step 2: Convert to fraction form
    811,483.80/1,217,225.70 = 212,443.80/x
  3. Step 3: Cross multiply
    811,483.80x = 1,217,225.70 × 212,443.80
  4. Step 4: Simplify right side
    811,483.80x = 258,592,053,165.66
  5. Step 5: Solve for x
    x = 258,592,053,165.66/811,483.80
  6. Step 6: Final answer
    x = 318,665.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.