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Finding the Fourth Proportional to 665,686.80, 998,530.20 and 508,222.80

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Solution

The fourth proportional to 665,686.80, 998,530.20 and 508,222.80 is: 762,334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,686.80 : 998,530.20 = 508,222.80 : x
  2. Step 2: Convert to fraction form
    665,686.80/998,530.20 = 508,222.80/x
  3. Step 3: Cross multiply
    665,686.80x = 998,530.20 × 508,222.80
  4. Step 4: Simplify right side
    665,686.80x = 507,475,814,128.56
  5. Step 5: Solve for x
    x = 507,475,814,128.56/665,686.80
  6. Step 6: Final answer
    x = 762,334.20

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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.