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Finding the Fourth Proportional to 611,283.60, 917,362.80 and 256,552.20

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Solution

The fourth proportional to 611,283.60, 917,362.80 and 256,552.20 is: 385,011.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,283.60 : 917,362.80 = 256,552.20 : x
  2. Step 2: Convert to fraction form
    611,283.60/917,362.80 = 256,552.20/x
  3. Step 3: Cross multiply
    611,283.60x = 917,362.80 × 256,552.20
  4. Step 4: Simplify right side
    611,283.60x = 235,351,444,538.16
  5. Step 5: Solve for x
    x = 235,351,444,538.16/611,283.60
  6. Step 6: Final answer
    x = 385,011.87

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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.