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Finding the Fourth Proportional to 620,601.20, 930,901.80 and 266,307.20

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Solution

The fourth proportional to 620,601.20, 930,901.80 and 266,307.20 is: 399,460.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,601.20 : 930,901.80 = 266,307.20 : x
  2. Step 2: Convert to fraction form
    620,601.20/930,901.80 = 266,307.20/x
  3. Step 3: Cross multiply
    620,601.20x = 930,901.80 × 266,307.20
  4. Step 4: Simplify right side
    620,601.20x = 247,905,851,832.96
  5. Step 5: Solve for x
    x = 247,905,851,832.96/620,601.20
  6. Step 6: Final answer
    x = 399,460.80

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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.