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Finding the Fourth Proportional to 659,920.20, 989,880.30 and 549,328.20

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Solution

The fourth proportional to 659,920.20, 989,880.30 and 549,328.20 is: 823,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,920.20 : 989,880.30 = 549,328.20 : x
  2. Step 2: Convert to fraction form
    659,920.20/989,880.30 = 549,328.20/x
  3. Step 3: Cross multiply
    659,920.20x = 989,880.30 × 549,328.20
  4. Step 4: Simplify right side
    659,920.20x = 543,769,163,414.46
  5. Step 5: Solve for x
    x = 543,769,163,414.46/659,920.20
  6. Step 6: Final answer
    x = 823,992.30

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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.