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Finding the Fourth Proportional to 611,486.10, 913,111.10 and 499,388.70

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Solution

The fourth proportional to 611,486.10, 913,111.10 and 499,388.70 is: 745,719.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,486.10 : 913,111.10 = 499,388.70 : x
  2. Step 2: Convert to fraction form
    611,486.10/913,111.10 = 499,388.70/x
  3. Step 3: Cross multiply
    611,486.10x = 913,111.10 × 499,388.70
  4. Step 4: Simplify right side
    611,486.10x = 455,997,362,687.63
  5. Step 5: Solve for x
    x = 455,997,362,687.63/611,486.10
  6. Step 6: Final answer
    x = 745,719.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.