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Finding the Fourth Proportional to 613,426.84, 918,915 and 487,280.68

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Solution

The fourth proportional to 613,426.84, 918,915 and 487,280.68 is: 729,947.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,426.84 : 918,915 = 487,280.68 : x
  2. Step 2: Convert to fraction form
    613,426.84/918,915 = 487,280.68/x
  3. Step 3: Cross multiply
    613,426.84x = 918,915 × 487,280.68
  4. Step 4: Simplify right side
    613,426.84x = 447,769,526,062.20
  5. Step 5: Solve for x
    x = 447,769,526,062.20/613,426.84
  6. Step 6: Final answer
    x = 729,947.72

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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.