Home / 687,146.36-948,068.16-445,439.12

Finding the Fourth Proportional to 687,146.36, 948,068.16 and 445,439.12

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Solution

The fourth proportional to 687,146.36, 948,068.16 and 445,439.12 is: 614,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,146.36 : 948,068.16 = 445,439.12 : x
  2. Step 2: Convert to fraction form
    687,146.36/948,068.16 = 445,439.12/x
  3. Step 3: Cross multiply
    687,146.36x = 948,068.16 × 445,439.12
  4. Step 4: Simplify right side
    687,146.36x = 422,306,646,890.42
  5. Step 5: Solve for x
    x = 422,306,646,890.42/687,146.36
  6. Step 6: Final answer
    x = 614,580.34

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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.