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Finding the Fourth Proportional to 666,734.13, 920,109.30 and 380,280.87

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Solution

The fourth proportional to 666,734.13, 920,109.30 and 380,280.87 is: 524,796.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,734.13 : 920,109.30 = 380,280.87 : x
  2. Step 2: Convert to fraction form
    666,734.13/920,109.30 = 380,280.87/x
  3. Step 3: Cross multiply
    666,734.13x = 920,109.30 × 380,280.87
  4. Step 4: Simplify right side
    666,734.13x = 349,899,965,099.09
  5. Step 5: Solve for x
    x = 349,899,965,099.09/666,734.13
  6. Step 6: Final answer
    x = 524,796.84

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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.