Home / 689,428.40-1,034,725.80-310,931.60

Finding the Fourth Proportional to 689,428.40, 1,034,725.80 and 310,931.60

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Solution

The fourth proportional to 689,428.40, 1,034,725.80 and 310,931.60 is: 466,660.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,428.40 : 1,034,725.80 = 310,931.60 : x
  2. Step 2: Convert to fraction form
    689,428.40/1,034,725.80 = 310,931.60/x
  3. Step 3: Cross multiply
    689,428.40x = 1,034,725.80 × 310,931.60
  4. Step 4: Simplify right side
    689,428.40x = 321,728,948,555.28
  5. Step 5: Solve for x
    x = 321,728,948,555.28/689,428.40
  6. Step 6: Final answer
    x = 466,660.42

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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.