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Finding the Fourth Proportional to 572,896.71, 790,619.90 and 391,988.07

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Solution

The fourth proportional to 572,896.71, 790,619.90 and 391,988.07 is: 540,958.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,896.71 : 790,619.90 = 391,988.07 : x
  2. Step 2: Convert to fraction form
    572,896.71/790,619.90 = 391,988.07/x
  3. Step 3: Cross multiply
    572,896.71x = 790,619.90 × 391,988.07
  4. Step 4: Simplify right side
    572,896.71x = 309,913,568,704.59
  5. Step 5: Solve for x
    x = 309,913,568,704.59/572,896.71
  6. Step 6: Final answer
    x = 540,958.89

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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.