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Finding the Fourth Proportional to 458,671.70, 688,007.55 and 143,087.60

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Solution

The fourth proportional to 458,671.70, 688,007.55 and 143,087.60 is: 214,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,671.70 : 688,007.55 = 143,087.60 : x
  2. Step 2: Convert to fraction form
    458,671.70/688,007.55 = 143,087.60/x
  3. Step 3: Cross multiply
    458,671.70x = 688,007.55 × 143,087.60
  4. Step 4: Simplify right side
    458,671.70x = 98,445,349,111.38
  5. Step 5: Solve for x
    x = 98,445,349,111.38/458,671.70
  6. Step 6: Final answer
    x = 214,631.40

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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.