Home / 579,623.40-868,268.70-390,666.60

Finding the Fourth Proportional to 579,623.40, 868,268.70 and 390,666.60

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Solution

The fourth proportional to 579,623.40, 868,268.70 and 390,666.60 is: 585,213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,623.40 : 868,268.70 = 390,666.60 : x
  2. Step 2: Convert to fraction form
    579,623.40/868,268.70 = 390,666.60/x
  3. Step 3: Cross multiply
    579,623.40x = 868,268.70 × 390,666.60
  4. Step 4: Simplify right side
    579,623.40x = 339,203,580,915.42
  5. Step 5: Solve for x
    x = 339,203,580,915.42/579,623.40
  6. Step 6: Final answer
    x = 585,213.75

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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.