Home / 811,905.40-1,217,858.10-392,001.40

Finding the Fourth Proportional to 811,905.40, 1,217,858.10 and 392,001.40

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Solution

The fourth proportional to 811,905.40, 1,217,858.10 and 392,001.40 is: 588,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,905.40 : 1,217,858.10 = 392,001.40 : x
  2. Step 2: Convert to fraction form
    811,905.40/1,217,858.10 = 392,001.40/x
  3. Step 3: Cross multiply
    811,905.40x = 1,217,858.10 × 392,001.40
  4. Step 4: Simplify right side
    811,905.40x = 477,402,080,201.34
  5. Step 5: Solve for x
    x = 477,402,080,201.34/811,905.40
  6. Step 6: Final answer
    x = 588,002.10

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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.