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Finding the Fourth Proportional to 628,407.70, 942,611.55 and 488,266.90

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Solution

The fourth proportional to 628,407.70, 942,611.55 and 488,266.90 is: 732,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,407.70 : 942,611.55 = 488,266.90 : x
  2. Step 2: Convert to fraction form
    628,407.70/942,611.55 = 488,266.90/x
  3. Step 3: Cross multiply
    628,407.70x = 942,611.55 × 488,266.90
  4. Step 4: Simplify right side
    628,407.70x = 460,246,019,422.70
  5. Step 5: Solve for x
    x = 460,246,019,422.70/628,407.70
  6. Step 6: Final answer
    x = 732,400.35

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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.