Home / 515,939.72-712,264.02-400,961.48

Finding the Fourth Proportional to 515,939.72, 712,264.02 and 400,961.48

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Solution

The fourth proportional to 515,939.72, 712,264.02 and 400,961.48 is: 553,534.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,939.72 : 712,264.02 = 400,961.48 : x
  2. Step 2: Convert to fraction form
    515,939.72/712,264.02 = 400,961.48/x
  3. Step 3: Cross multiply
    515,939.72x = 712,264.02 × 400,961.48
  4. Step 4: Simplify right side
    515,939.72x = 285,590,435,609.95
  5. Step 5: Solve for x
    x = 285,590,435,609.95/515,939.72
  6. Step 6: Final answer
    x = 553,534.50

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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.