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Finding the Fourth Proportional to 612,602.70, 918,904.05 and 443,328.90

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Solution

The fourth proportional to 612,602.70, 918,904.05 and 443,328.90 is: 664,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,602.70 : 918,904.05 = 443,328.90 : x
  2. Step 2: Convert to fraction form
    612,602.70/918,904.05 = 443,328.90/x
  3. Step 3: Cross multiply
    612,602.70x = 918,904.05 × 443,328.90
  4. Step 4: Simplify right side
    612,602.70x = 407,376,721,692.05
  5. Step 5: Solve for x
    x = 407,376,721,692.05/612,602.70
  6. Step 6: Final answer
    x = 664,993.35

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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.