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Finding the Fourth Proportional to 455,427.60, 683,141.40 and 306,128.40

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Solution

The fourth proportional to 455,427.60, 683,141.40 and 306,128.40 is: 459,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,427.60 : 683,141.40 = 306,128.40 : x
  2. Step 2: Convert to fraction form
    455,427.60/683,141.40 = 306,128.40/x
  3. Step 3: Cross multiply
    455,427.60x = 683,141.40 × 306,128.40
  4. Step 4: Simplify right side
    455,427.60x = 209,128,983,755.76
  5. Step 5: Solve for x
    x = 209,128,983,755.76/455,427.60
  6. Step 6: Final answer
    x = 459,192.60

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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.