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Finding the Fourth Proportional to 917,007.20, 1,375,705.20 and 277,258.40

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Solution

The fourth proportional to 917,007.20, 1,375,705.20 and 277,258.40 is: 415,946.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,007.20 : 1,375,705.20 = 277,258.40 : x
  2. Step 2: Convert to fraction form
    917,007.20/1,375,705.20 = 277,258.40/x
  3. Step 3: Cross multiply
    917,007.20x = 1,375,705.20 × 277,258.40
  4. Step 4: Simplify right side
    917,007.20x = 381,425,822,623.68
  5. Step 5: Solve for x
    x = 381,425,822,623.68/917,007.20
  6. Step 6: Final answer
    x = 415,946.38

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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.