Home / 947,857.32-1,308,043.20-518,139.20

Finding the Fourth Proportional to 947,857.32, 1,308,043.20 and 518,139.20

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Solution

The fourth proportional to 947,857.32, 1,308,043.20 and 518,139.20 is: 715,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,857.32 : 1,308,043.20 = 518,139.20 : x
  2. Step 2: Convert to fraction form
    947,857.32/1,308,043.20 = 518,139.20/x
  3. Step 3: Cross multiply
    947,857.32x = 1,308,043.20 × 518,139.20
  4. Step 4: Simplify right side
    947,857.32x = 677,748,457,213.44
  5. Step 5: Solve for x
    x = 677,748,457,213.44/947,857.32
  6. Step 6: Final answer
    x = 715,032.15

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Double scale
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Similar ratio
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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.