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Finding the Fourth Proportional to 922,679.60, 1,384,019.40 and 639,244.40

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Solution

The fourth proportional to 922,679.60, 1,384,019.40 and 639,244.40 is: 958,866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,679.60 : 1,384,019.40 = 639,244.40 : x
  2. Step 2: Convert to fraction form
    922,679.60/1,384,019.40 = 639,244.40/x
  3. Step 3: Cross multiply
    922,679.60x = 1,384,019.40 × 639,244.40
  4. Step 4: Simplify right side
    922,679.60x = 884,726,650,941.36
  5. Step 5: Solve for x
    x = 884,726,650,941.36/922,679.60
  6. Step 6: Final answer
    x = 958,866.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.