Home / 807,787.40-1,211,681.10-409,656.20

Finding the Fourth Proportional to 807,787.40, 1,211,681.10 and 409,656.20

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Solution

The fourth proportional to 807,787.40, 1,211,681.10 and 409,656.20 is: 614,484.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,787.40 : 1,211,681.10 = 409,656.20 : x
  2. Step 2: Convert to fraction form
    807,787.40/1,211,681.10 = 409,656.20/x
  3. Step 3: Cross multiply
    807,787.40x = 1,211,681.10 × 409,656.20
  4. Step 4: Simplify right side
    807,787.40x = 496,372,675,037.82
  5. Step 5: Solve for x
    x = 496,372,675,037.82/807,787.40
  6. Step 6: Final answer
    x = 614,484.30

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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.