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Finding the Fourth Proportional to 507,947.80, 761,921.70 and 256,005.40

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Solution

The fourth proportional to 507,947.80, 761,921.70 and 256,005.40 is: 384,008.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,947.80 : 761,921.70 = 256,005.40 : x
  2. Step 2: Convert to fraction form
    507,947.80/761,921.70 = 256,005.40/x
  3. Step 3: Cross multiply
    507,947.80x = 761,921.70 × 256,005.40
  4. Step 4: Simplify right side
    507,947.80x = 195,056,069,577.18
  5. Step 5: Solve for x
    x = 195,056,069,577.18/507,947.80
  6. Step 6: Final answer
    x = 384,008.10

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Half scale
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Double scale
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Similar ratio
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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.