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Finding the Fourth Proportional to 561,963.76, 775,509.96 and 307,315.12

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Solution

The fourth proportional to 561,963.76, 775,509.96 and 307,315.12 is: 424,094.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,963.76 : 775,509.96 = 307,315.12 : x
  2. Step 2: Convert to fraction form
    561,963.76/775,509.96 = 307,315.12/x
  3. Step 3: Cross multiply
    561,963.76x = 775,509.96 × 307,315.12
  4. Step 4: Simplify right side
    561,963.76x = 238,325,936,418.60
  5. Step 5: Solve for x
    x = 238,325,936,418.60/561,963.76
  6. Step 6: Final answer
    x = 424,094.85

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1.5x scale

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.