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Finding the Fourth Proportional to 612,069.40, 918,104.10 and 328,634.20

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Solution

The fourth proportional to 612,069.40, 918,104.10 and 328,634.20 is: 492,951.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,069.40 : 918,104.10 = 328,634.20 : x
  2. Step 2: Convert to fraction form
    612,069.40/918,104.10 = 328,634.20/x
  3. Step 3: Cross multiply
    612,069.40x = 918,104.10 × 328,634.20
  4. Step 4: Simplify right side
    612,069.40x = 301,720,406,420.22
  5. Step 5: Solve for x
    x = 301,720,406,420.22/612,069.40
  6. Step 6: Final answer
    x = 492,951.30

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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.