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Finding the Fourth Proportional to 718,157.78, 989,715.21 and 536,549.30

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Solution

The fourth proportional to 718,157.78, 989,715.21 and 536,549.30 is: 739,435.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,157.78 : 989,715.21 = 536,549.30 : x
  2. Step 2: Convert to fraction form
    718,157.78/989,715.21 = 536,549.30/x
  3. Step 3: Cross multiply
    718,157.78x = 989,715.21 × 536,549.30
  4. Step 4: Simplify right side
    718,157.78x = 531,031,003,124.85
  5. Step 5: Solve for x
    x = 531,031,003,124.85/718,157.78
  6. Step 6: Final answer
    x = 739,435.01

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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.