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Finding the Fourth Proportional to 518,946.89, 778,362.41 and 139,905.36

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Solution

The fourth proportional to 518,946.89, 778,362.41 and 139,905.36 is: 209,842.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,946.89 : 778,362.41 = 139,905.36 : x
  2. Step 2: Convert to fraction form
    518,946.89/778,362.41 = 139,905.36/x
  3. Step 3: Cross multiply
    518,946.89x = 778,362.41 × 139,905.36
  4. Step 4: Simplify right side
    518,946.89x = 108,897,073,531.28
  5. Step 5: Solve for x
    x = 108,897,073,531.28/518,946.89
  6. Step 6: Final answer
    x = 209,842.43

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1.5x scale

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.