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Finding the Fourth Proportional to 391,665.16, 540,491.70 and 230,501.08

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Solution

The fourth proportional to 391,665.16, 540,491.70 and 230,501.08 is: 318,087.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,665.16 : 540,491.70 = 230,501.08 : x
  2. Step 2: Convert to fraction form
    391,665.16/540,491.70 = 230,501.08/x
  3. Step 3: Cross multiply
    391,665.16x = 540,491.70 × 230,501.08
  4. Step 4: Simplify right side
    391,665.16x = 124,583,920,581.04
  5. Step 5: Solve for x
    x = 124,583,920,581.04/391,665.16
  6. Step 6: Final answer
    x = 318,087.83

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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.