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Finding the Fourth Proportional to 407,435.40, 611,210.70 and 126,923.40

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Solution

The fourth proportional to 407,435.40, 611,210.70 and 126,923.40 is: 190,403.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,435.40 : 611,210.70 = 126,923.40 : x
  2. Step 2: Convert to fraction form
    407,435.40/611,210.70 = 126,923.40/x
  3. Step 3: Cross multiply
    407,435.40x = 611,210.70 × 126,923.40
  4. Step 4: Simplify right side
    407,435.40x = 77,576,940,160.38
  5. Step 5: Solve for x
    x = 77,576,940,160.38/407,435.40
  6. Step 6: Final answer
    x = 190,403.04

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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.