Home / 811,429.60-1,216,885.20-338,000.80

Finding the Fourth Proportional to 811,429.60, 1,216,885.20 and 338,000.80

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Solution

The fourth proportional to 811,429.60, 1,216,885.20 and 338,000.80 is: 506,893.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,429.60 : 1,216,885.20 = 338,000.80 : x
  2. Step 2: Convert to fraction form
    811,429.60/1,216,885.20 = 338,000.80/x
  3. Step 3: Cross multiply
    811,429.60x = 1,216,885.20 × 338,000.80
  4. Step 4: Simplify right side
    811,429.60x = 411,308,171,108.16
  5. Step 5: Solve for x
    x = 411,308,171,108.16/811,429.60
  6. Step 6: Final answer
    x = 506,893.23

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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.