Home / 811,639.17-1,215,399.18-487,225.38

Finding the Fourth Proportional to 811,639.17, 1,215,399.18 and 487,225.38

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Solution

The fourth proportional to 811,639.17, 1,215,399.18 and 487,225.38 is: 729,601.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,639.17 : 1,215,399.18 = 487,225.38 : x
  2. Step 2: Convert to fraction form
    811,639.17/1,215,399.18 = 487,225.38/x
  3. Step 3: Cross multiply
    811,639.17x = 1,215,399.18 × 487,225.38
  4. Step 4: Simplify right side
    811,639.17x = 592,173,327,327.19
  5. Step 5: Solve for x
    x = 592,173,327,327.19/811,639.17
  6. Step 6: Final answer
    x = 729,601.71

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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.