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Finding the Fourth Proportional to 612,323.70, 918,485.55 and 312,704.70

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Solution

The fourth proportional to 612,323.70, 918,485.55 and 312,704.70 is: 469,057.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,323.70 : 918,485.55 = 312,704.70 : x
  2. Step 2: Convert to fraction form
    612,323.70/918,485.55 = 312,704.70/x
  3. Step 3: Cross multiply
    612,323.70x = 918,485.55 × 312,704.70
  4. Step 4: Simplify right side
    612,323.70x = 287,214,748,367.09
  5. Step 5: Solve for x
    x = 287,214,748,367.09/612,323.70
  6. Step 6: Final answer
    x = 469,057.05

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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.