Home / 579,621.40-868,265.70-390,664.60

Finding the Fourth Proportional to 579,621.40, 868,265.70 and 390,664.60

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Solution

The fourth proportional to 579,621.40, 868,265.70 and 390,664.60 is: 585,210.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,621.40 : 868,265.70 = 390,664.60 : x
  2. Step 2: Convert to fraction form
    579,621.40/868,265.70 = 390,664.60/x
  3. Step 3: Cross multiply
    579,621.40x = 868,265.70 × 390,664.60
  4. Step 4: Simplify right side
    579,621.40x = 339,200,672,384.22
  5. Step 5: Solve for x
    x = 339,200,672,384.22/579,621.40
  6. Step 6: Final answer
    x = 585,210.75

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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.