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Finding the Fourth Proportional to 628,411.20, 942,616.80 and 488,270.40

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Solution

The fourth proportional to 628,411.20, 942,616.80 and 488,270.40 is: 732,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,411.20 : 942,616.80 = 488,270.40 : x
  2. Step 2: Convert to fraction form
    628,411.20/942,616.80 = 488,270.40/x
  3. Step 3: Cross multiply
    628,411.20x = 942,616.80 × 488,270.40
  4. Step 4: Simplify right side
    628,411.20x = 460,251,881,982.72
  5. Step 5: Solve for x
    x = 460,251,881,982.72/628,411.20
  6. Step 6: Final answer
    x = 732,405.60

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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.