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Finding the Fourth Proportional to 813,598.40, 1,123,212.64 and 555,862.88

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Solution

The fourth proportional to 813,598.40, 1,123,212.64 and 555,862.88 is: 767,396.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,598.40 : 1,123,212.64 = 555,862.88 : x
  2. Step 2: Convert to fraction form
    813,598.40/1,123,212.64 = 555,862.88/x
  3. Step 3: Cross multiply
    813,598.40x = 1,123,212.64 × 555,862.88
  4. Step 4: Simplify right side
    813,598.40x = 624,352,212,922.80
  5. Step 5: Solve for x
    x = 624,352,212,922.80/813,598.40
  6. Step 6: Final answer
    x = 767,396.07

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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.