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Finding the Fourth Proportional to 658,998.92, 909,408.64 and 372,509

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Solution

The fourth proportional to 658,998.92, 909,408.64 and 372,509 is: 514,056.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,998.92 : 909,408.64 = 372,509 : x
  2. Step 2: Convert to fraction form
    658,998.92/909,408.64 = 372,509/x
  3. Step 3: Cross multiply
    658,998.92x = 909,408.64 × 372,509
  4. Step 4: Simplify right side
    658,998.92x = 338,762,903,077.76
  5. Step 5: Solve for x
    x = 338,762,903,077.76/658,998.92
  6. Step 6: Final answer
    x = 514,056.84

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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.