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Finding the Fourth Proportional to 487,301.46, 731,588.81 and 391,289.94

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Solution

The fourth proportional to 487,301.46, 731,588.81 and 391,289.94 is: 587,446.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,301.46 : 731,588.81 = 391,289.94 : x
  2. Step 2: Convert to fraction form
    487,301.46/731,588.81 = 391,289.94/x
  3. Step 3: Cross multiply
    487,301.46x = 731,588.81 × 391,289.94
  4. Step 4: Simplify right side
    487,301.46x = 286,263,339,613.12
  5. Step 5: Solve for x
    x = 286,263,339,613.12/487,301.46
  6. Step 6: Final answer
    x = 587,446.09

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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.