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Finding the Fourth Proportional to 459,077.28, 688,655.60 and 126,653.28

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Solution

The fourth proportional to 459,077.28, 688,655.60 and 126,653.28 is: 189,990.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,077.28 : 688,655.60 = 126,653.28 : x
  2. Step 2: Convert to fraction form
    459,077.28/688,655.60 = 126,653.28/x
  3. Step 3: Cross multiply
    459,077.28x = 688,655.60 × 126,653.28
  4. Step 4: Simplify right side
    459,077.28x = 87,220,490,530.37
  5. Step 5: Solve for x
    x = 87,220,490,530.37/459,077.28
  6. Step 6: Final answer
    x = 189,990.87

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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.