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Finding the Fourth Proportional to 611,412.20, 917,118.30 and 493,314.20

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Solution

The fourth proportional to 611,412.20, 917,118.30 and 493,314.20 is: 739,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,412.20 : 917,118.30 = 493,314.20 : x
  2. Step 2: Convert to fraction form
    611,412.20/917,118.30 = 493,314.20/x
  3. Step 3: Cross multiply
    611,412.20x = 917,118.30 × 493,314.20
  4. Step 4: Simplify right side
    611,412.20x = 452,427,480,469.86
  5. Step 5: Solve for x
    x = 452,427,480,469.86/611,412.20
  6. Step 6: Final answer
    x = 739,971.30

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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.