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Finding the Fourth Proportional to 459,783.20, 689,674.80 and 127,359.20

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Solution

The fourth proportional to 459,783.20, 689,674.80 and 127,359.20 is: 191,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,783.20 : 689,674.80 = 127,359.20 : x
  2. Step 2: Convert to fraction form
    459,783.20/689,674.80 = 127,359.20/x
  3. Step 3: Cross multiply
    459,783.20x = 689,674.80 × 127,359.20
  4. Step 4: Simplify right side
    459,783.20x = 87,836,430,788.16
  5. Step 5: Solve for x
    x = 87,836,430,788.16/459,783.20
  6. Step 6: Final answer
    x = 191,038.80

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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.