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Finding the Fourth Proportional to 660,066.40, 989,869.20 and 344,418.40

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Solution

The fourth proportional to 660,066.40, 989,869.20 and 344,418.40 is: 516,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,066.40 : 989,869.20 = 344,418.40 : x
  2. Step 2: Convert to fraction form
    660,066.40/989,869.20 = 344,418.40/x
  3. Step 3: Cross multiply
    660,066.40x = 989,869.20 × 344,418.40
  4. Step 4: Simplify right side
    660,066.40x = 340,929,166,073.28
  5. Step 5: Solve for x
    x = 340,929,166,073.28/660,066.40
  6. Step 6: Final answer
    x = 516,507.38

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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.