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Finding the Fourth Proportional to 545,876.40, 817,939.80 and 345,838.80

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Solution

The fourth proportional to 545,876.40, 817,939.80 and 345,838.80 is: 518,203.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,876.40 : 817,939.80 = 345,838.80 : x
  2. Step 2: Convert to fraction form
    545,876.40/817,939.80 = 345,838.80/x
  3. Step 3: Cross multiply
    545,876.40x = 817,939.80 × 345,838.80
  4. Step 4: Simplify right side
    545,876.40x = 282,875,318,904.24
  5. Step 5: Solve for x
    x = 282,875,318,904.24/545,876.40
  6. Step 6: Final answer
    x = 518,203.97

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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.