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Finding the Fourth Proportional to 648,712.60, 973,161.90 and 199,471.20

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Solution

The fourth proportional to 648,712.60, 973,161.90 and 199,471.20 is: 299,235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,712.60 : 973,161.90 = 199,471.20 : x
  2. Step 2: Convert to fraction form
    648,712.60/973,161.90 = 199,471.20/x
  3. Step 3: Cross multiply
    648,712.60x = 973,161.90 × 199,471.20
  4. Step 4: Simplify right side
    648,712.60x = 194,117,771,987.28
  5. Step 5: Solve for x
    x = 194,117,771,987.28/648,712.60
  6. Step 6: Final answer
    x = 299,235.40

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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.