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Finding the Fourth Proportional to 687,312.56, 948,180.60 and 445,656.32

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Solution

The fourth proportional to 687,312.56, 948,180.60 and 445,656.32 is: 614,804.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,312.56 : 948,180.60 = 445,656.32 : x
  2. Step 2: Convert to fraction form
    687,312.56/948,180.60 = 445,656.32/x
  3. Step 3: Cross multiply
    687,312.56x = 948,180.60 × 445,656.32
  4. Step 4: Simplify right side
    687,312.56x = 422,562,676,891.39
  5. Step 5: Solve for x
    x = 422,562,676,891.39/687,312.56
  6. Step 6: Final answer
    x = 614,804.24

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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.