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Finding the Fourth Proportional to 548,465.40, 821,094.30 and 391,001.40

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Solution

The fourth proportional to 548,465.40, 821,094.30 and 391,001.40 is: 585,358.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,465.40 : 821,094.30 = 391,001.40 : x
  2. Step 2: Convert to fraction form
    548,465.40/821,094.30 = 391,001.40/x
  3. Step 3: Cross multiply
    548,465.40x = 821,094.30 × 391,001.40
  4. Step 4: Simplify right side
    548,465.40x = 321,049,020,832.02
  5. Step 5: Solve for x
    x = 321,049,020,832.02/548,465.40
  6. Step 6: Final answer
    x = 585,358.75

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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.