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Finding the Fourth Proportional to 670,606.80, 1,005,910.20 and 404,230.20

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Solution

The fourth proportional to 670,606.80, 1,005,910.20 and 404,230.20 is: 606,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,606.80 : 1,005,910.20 = 404,230.20 : x
  2. Step 2: Convert to fraction form
    670,606.80/1,005,910.20 = 404,230.20/x
  3. Step 3: Cross multiply
    670,606.80x = 1,005,910.20 × 404,230.20
  4. Step 4: Simplify right side
    670,606.80x = 406,619,281,328.04
  5. Step 5: Solve for x
    x = 406,619,281,328.04/670,606.80
  6. Step 6: Final answer
    x = 606,345.30

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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.