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Finding the Fourth Proportional to 612,071.60, 918,107.40 and 486,100.40

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Solution

The fourth proportional to 612,071.60, 918,107.40 and 486,100.40 is: 729,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,071.60 : 918,107.40 = 486,100.40 : x
  2. Step 2: Convert to fraction form
    612,071.60/918,107.40 = 486,100.40/x
  3. Step 3: Cross multiply
    612,071.60x = 918,107.40 × 486,100.40
  4. Step 4: Simplify right side
    612,071.60x = 446,292,374,382.96
  5. Step 5: Solve for x
    x = 446,292,374,382.96/612,071.60
  6. Step 6: Final answer
    x = 729,150.60

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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.