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Finding the Fourth Proportional to 764,259.84, 1,053,686.88 and 491,840.64

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Solution

The fourth proportional to 764,259.84, 1,053,686.88 and 491,840.64 is: 678,101.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,259.84 : 1,053,686.88 = 491,840.64 : x
  2. Step 2: Convert to fraction form
    764,259.84/1,053,686.88 = 491,840.64/x
  3. Step 3: Cross multiply
    764,259.84x = 1,053,686.88 × 491,840.64
  4. Step 4: Simplify right side
    764,259.84x = 518,246,029,418.80
  5. Step 5: Solve for x
    x = 518,246,029,418.80/764,259.84
  6. Step 6: Final answer
    x = 678,101.87

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.