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Finding the Fourth Proportional to 691,242.58, 953,916.78 and 400,910.13

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Solution

The fourth proportional to 691,242.58, 953,916.78 and 400,910.13 is: 553,257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,242.58 : 953,916.78 = 400,910.13 : x
  2. Step 2: Convert to fraction form
    691,242.58/953,916.78 = 400,910.13/x
  3. Step 3: Cross multiply
    691,242.58x = 953,916.78 × 400,910.13
  4. Step 4: Simplify right side
    691,242.58x = 382,434,901,082.61
  5. Step 5: Solve for x
    x = 382,434,901,082.61/691,242.58
  6. Step 6: Final answer
    x = 553,257.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.