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Finding the Fourth Proportional to 715,150.64, 986,770.44 and 485,889.68

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Solution

The fourth proportional to 715,150.64, 986,770.44 and 485,889.68 is: 670,434.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,150.64 : 986,770.44 = 485,889.68 : x
  2. Step 2: Convert to fraction form
    715,150.64/986,770.44 = 485,889.68/x
  3. Step 3: Cross multiply
    715,150.64x = 986,770.44 × 485,889.68
  4. Step 4: Simplify right side
    715,150.64x = 479,461,573,325.06
  5. Step 5: Solve for x
    x = 479,461,573,325.06/715,150.64
  6. Step 6: Final answer
    x = 670,434.38

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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.