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Finding the Fourth Proportional to 611,606.70, 917,519.40 and 256,656.60

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Solution

The fourth proportional to 611,606.70, 917,519.40 and 256,656.60 is: 385,030.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,606.70 : 917,519.40 = 256,656.60 : x
  2. Step 2: Convert to fraction form
    611,606.70/917,519.40 = 256,656.60/x
  3. Step 3: Cross multiply
    611,606.70x = 917,519.40 × 256,656.60
  4. Step 4: Simplify right side
    611,606.70x = 235,487,409,638.04
  5. Step 5: Solve for x
    x = 235,487,409,638.04/611,606.70
  6. Step 6: Final answer
    x = 385,030.79

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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.