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Finding the Fourth Proportional to 479,747.50, 662,109.87 and 278,543.50

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Solution

The fourth proportional to 479,747.50, 662,109.87 and 278,543.50 is: 384,423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,747.50 : 662,109.87 = 278,543.50 : x
  2. Step 2: Convert to fraction form
    479,747.50/662,109.87 = 278,543.50/x
  3. Step 3: Cross multiply
    479,747.50x = 662,109.87 × 278,543.50
  4. Step 4: Simplify right side
    479,747.50x = 184,426,400,574.35
  5. Step 5: Solve for x
    x = 184,426,400,574.35/479,747.50
  6. Step 6: Final answer
    x = 384,423.89

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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.