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Finding the Fourth Proportional to 458,886.70, 688,330.05 and 209,568.70

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Solution

The fourth proportional to 458,886.70, 688,330.05 and 209,568.70 is: 314,353.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,886.70 : 688,330.05 = 209,568.70 : x
  2. Step 2: Convert to fraction form
    458,886.70/688,330.05 = 209,568.70/x
  3. Step 3: Cross multiply
    458,886.70x = 688,330.05 × 209,568.70
  4. Step 4: Simplify right side
    458,886.70x = 144,252,433,749.44
  5. Step 5: Solve for x
    x = 144,252,433,749.44/458,886.70
  6. Step 6: Final answer
    x = 314,353.05

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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.