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Finding the Fourth Proportional to 547,987.70, 821,981.55 and 359,030.90

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Solution

The fourth proportional to 547,987.70, 821,981.55 and 359,030.90 is: 538,546.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,987.70 : 821,981.55 = 359,030.90 : x
  2. Step 2: Convert to fraction form
    547,987.70/821,981.55 = 359,030.90/x
  3. Step 3: Cross multiply
    547,987.70x = 821,981.55 × 359,030.90
  4. Step 4: Simplify right side
    547,987.70x = 295,116,775,679.90
  5. Step 5: Solve for x
    x = 295,116,775,679.90/547,987.70
  6. Step 6: Final answer
    x = 538,546.35

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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.