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Finding the Fourth Proportional to 666,786.36, 920,158.05 and 360,856.05

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Solution

The fourth proportional to 666,786.36, 920,158.05 and 360,856.05 is: 497,977.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,786.36 : 920,158.05 = 360,856.05 : x
  2. Step 2: Convert to fraction form
    666,786.36/920,158.05 = 360,856.05/x
  3. Step 3: Cross multiply
    666,786.36x = 920,158.05 × 360,856.05
  4. Step 4: Simplify right side
    666,786.36x = 332,044,599,298.70
  5. Step 5: Solve for x
    x = 332,044,599,298.70/666,786.36
  6. Step 6: Final answer
    x = 497,977.49

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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.