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Finding the Fourth Proportional to 660,056.40, 989,854.20 and 344,408.40

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Solution

The fourth proportional to 660,056.40, 989,854.20 and 344,408.40 is: 516,492.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,056.40 : 989,854.20 = 344,408.40 : x
  2. Step 2: Convert to fraction form
    660,056.40/989,854.20 = 344,408.40/x
  3. Step 3: Cross multiply
    660,056.40x = 989,854.20 × 344,408.40
  4. Step 4: Simplify right side
    660,056.40x = 340,914,101,255.28
  5. Step 5: Solve for x
    x = 340,914,101,255.28/660,056.40
  6. Step 6: Final answer
    x = 516,492.38

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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.