Home / 485,985.28-670,644.48-284,915.20

Finding the Fourth Proportional to 485,985.28, 670,644.48 and 284,915.20

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Solution

The fourth proportional to 485,985.28, 670,644.48 and 284,915.20 is: 393,174.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,985.28 : 670,644.48 = 284,915.20 : x
  2. Step 2: Convert to fraction form
    485,985.28/670,644.48 = 284,915.20/x
  3. Step 3: Cross multiply
    485,985.28x = 670,644.48 × 284,915.20
  4. Step 4: Simplify right side
    485,985.28x = 191,076,806,148.10
  5. Step 5: Solve for x
    x = 191,076,806,148.10/485,985.28
  6. Step 6: Final answer
    x = 393,174.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.