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Finding the Fourth Proportional to 389,376.70, 583,143.45 and 264,039.10

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Solution

The fourth proportional to 389,376.70, 583,143.45 and 264,039.10 is: 395,433.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,376.70 : 583,143.45 = 264,039.10 : x
  2. Step 2: Convert to fraction form
    389,376.70/583,143.45 = 264,039.10/x
  3. Step 3: Cross multiply
    389,376.70x = 583,143.45 × 264,039.10
  4. Step 4: Simplify right side
    389,376.70x = 153,972,671,708.90
  5. Step 5: Solve for x
    x = 153,972,671,708.90/389,376.70
  6. Step 6: Final answer
    x = 395,433.71

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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.