Home / 690,450.40-1,035,675.60-217,280.80

Finding the Fourth Proportional to 690,450.40, 1,035,675.60 and 217,280.80

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Solution

The fourth proportional to 690,450.40, 1,035,675.60 and 217,280.80 is: 325,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,450.40 : 1,035,675.60 = 217,280.80 : x
  2. Step 2: Convert to fraction form
    690,450.40/1,035,675.60 = 217,280.80/x
  3. Step 3: Cross multiply
    690,450.40x = 1,035,675.60 × 217,280.80
  4. Step 4: Simplify right side
    690,450.40x = 225,032,422,908.48
  5. Step 5: Solve for x
    x = 225,032,422,908.48/690,450.40
  6. Step 6: Final answer
    x = 325,921.20

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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.