Home / 811,653.64-1,217,646.51-279,105.50

Finding the Fourth Proportional to 811,653.64, 1,217,646.51 and 279,105.50

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Solution

The fourth proportional to 811,653.64, 1,217,646.51 and 279,105.50 is: 418,715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,653.64 : 1,217,646.51 = 279,105.50 : x
  2. Step 2: Convert to fraction form
    811,653.64/1,217,646.51 = 279,105.50/x
  3. Step 3: Cross multiply
    811,653.64x = 1,217,646.51 × 279,105.50
  4. Step 4: Simplify right side
    811,653.64x = 339,851,840,343.16
  5. Step 5: Solve for x
    x = 339,851,840,343.16/811,653.64
  6. Step 6: Final answer
    x = 418,715.35

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Double scale
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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.