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Finding the Fourth Proportional to 977,201.20, 1,465,728.90 and 408,435.40

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Solution

The fourth proportional to 977,201.20, 1,465,728.90 and 408,435.40 is: 612,622.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,201.20 : 1,465,728.90 = 408,435.40 : x
  2. Step 2: Convert to fraction form
    977,201.20/1,465,728.90 = 408,435.40/x
  3. Step 3: Cross multiply
    977,201.20x = 1,465,728.90 × 408,435.40
  4. Step 4: Simplify right side
    977,201.20x = 598,655,569,563.06
  5. Step 5: Solve for x
    x = 598,655,569,563.06/977,201.20
  6. Step 6: Final answer
    x = 612,622.63

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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.