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Finding the Fourth Proportional to 612,200.40, 918,300.60 and 328,765.20

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Solution

The fourth proportional to 612,200.40, 918,300.60 and 328,765.20 is: 493,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,200.40 : 918,300.60 = 328,765.20 : x
  2. Step 2: Convert to fraction form
    612,200.40/918,300.60 = 328,765.20/x
  3. Step 3: Cross multiply
    612,200.40x = 918,300.60 × 328,765.20
  4. Step 4: Simplify right side
    612,200.40x = 301,905,280,419.12
  5. Step 5: Solve for x
    x = 301,905,280,419.12/612,200.40
  6. Step 6: Final answer
    x = 493,147.80

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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.