Home / 579,579.40-868,202.70-390,622.60

Finding the Fourth Proportional to 579,579.40, 868,202.70 and 390,622.60

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Solution

The fourth proportional to 579,579.40, 868,202.70 and 390,622.60 is: 585,147.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,579.40 : 868,202.70 = 390,622.60 : x
  2. Step 2: Convert to fraction form
    579,579.40/868,202.70 = 390,622.60/x
  3. Step 3: Cross multiply
    579,579.40x = 868,202.70 × 390,622.60
  4. Step 4: Simplify right side
    579,579.40x = 339,139,596,001.02
  5. Step 5: Solve for x
    x = 339,139,596,001.02/579,579.40
  6. Step 6: Final answer
    x = 585,147.77

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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.