Home / 679,915.80-1,018,998.90-413,393.40

Finding the Fourth Proportional to 679,915.80, 1,018,998.90 and 413,393.40

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Solution

The fourth proportional to 679,915.80, 1,018,998.90 and 413,393.40 is: 619,558.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,915.80 : 1,018,998.90 = 413,393.40 : x
  2. Step 2: Convert to fraction form
    679,915.80/1,018,998.90 = 413,393.40/x
  3. Step 3: Cross multiply
    679,915.80x = 1,018,998.90 × 413,393.40
  4. Step 4: Simplify right side
    679,915.80x = 421,247,419,867.26
  5. Step 5: Solve for x
    x = 421,247,419,867.26/679,915.80
  6. Step 6: Final answer
    x = 619,558.22

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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.