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Finding the Fourth Proportional to 500,308.71, 690,421.19 and 270,860.13

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Solution

The fourth proportional to 500,308.71, 690,421.19 and 270,860.13 is: 373,784.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,308.71 : 690,421.19 = 270,860.13 : x
  2. Step 2: Convert to fraction form
    500,308.71/690,421.19 = 270,860.13/x
  3. Step 3: Cross multiply
    500,308.71x = 690,421.19 × 270,860.13
  4. Step 4: Simplify right side
    500,308.71x = 187,007,571,923.85
  5. Step 5: Solve for x
    x = 187,007,571,923.85/500,308.71
  6. Step 6: Final answer
    x = 373,784.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.