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Finding the Fourth Proportional to 616,639.68, 851,099.94 and 374,871

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Solution

The fourth proportional to 616,639.68, 851,099.94 and 374,871 is: 517,405.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,639.68 : 851,099.94 = 374,871 : x
  2. Step 2: Convert to fraction form
    616,639.68/851,099.94 = 374,871/x
  3. Step 3: Cross multiply
    616,639.68x = 851,099.94 × 374,871
  4. Step 4: Simplify right side
    616,639.68x = 319,052,685,607.74
  5. Step 5: Solve for x
    x = 319,052,685,607.74/616,639.68
  6. Step 6: Final answer
    x = 517,405.38

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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.