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Finding the Fourth Proportional to 607,128, 837,836.64 and 338,856

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Solution

The fourth proportional to 607,128, 837,836.64 and 338,856 is: 467,621.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,128 : 837,836.64 = 338,856 : x
  2. Step 2: Convert to fraction form
    607,128/837,836.64 = 338,856/x
  3. Step 3: Cross multiply
    607,128x = 837,836.64 × 338,856
  4. Step 4: Simplify right side
    607,128x = 283,905,972,483.84
  5. Step 5: Solve for x
    x = 283,905,972,483.84/607,128
  6. Step 6: Final answer
    x = 467,621.28

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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.