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Finding the Fourth Proportional to 515,916.80, 772,838.40 and 347,955.20

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Solution

The fourth proportional to 515,916.80, 772,838.40 and 347,955.20 is: 521,233.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,916.80 : 772,838.40 = 347,955.20 : x
  2. Step 2: Convert to fraction form
    515,916.80/772,838.40 = 347,955.20/x
  3. Step 3: Cross multiply
    515,916.80x = 772,838.40 × 347,955.20
  4. Step 4: Simplify right side
    515,916.80x = 268,913,140,039.68
  5. Step 5: Solve for x
    x = 268,913,140,039.68/515,916.80
  6. Step 6: Final answer
    x = 521,233.54

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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.