Home / 811,904.40-1,217,856.60-392,000.40

Finding the Fourth Proportional to 811,904.40, 1,217,856.60 and 392,000.40

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Solution

The fourth proportional to 811,904.40, 1,217,856.60 and 392,000.40 is: 588,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,904.40 : 1,217,856.60 = 392,000.40 : x
  2. Step 2: Convert to fraction form
    811,904.40/1,217,856.60 = 392,000.40/x
  3. Step 3: Cross multiply
    811,904.40x = 1,217,856.60 × 392,000.40
  4. Step 4: Simplify right side
    811,904.40x = 477,400,274,342.64
  5. Step 5: Solve for x
    x = 477,400,274,342.64/811,904.40
  6. Step 6: Final answer
    x = 588,000.60

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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.