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Finding the Fourth Proportional to 641,756.64, 885,656.76 and 369,868.80

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Solution

The fourth proportional to 641,756.64, 885,656.76 and 369,868.80 is: 510,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,756.64 : 885,656.76 = 369,868.80 : x
  2. Step 2: Convert to fraction form
    641,756.64/885,656.76 = 369,868.80/x
  3. Step 3: Cross multiply
    641,756.64x = 885,656.76 × 369,868.80
  4. Step 4: Simplify right side
    641,756.64x = 327,576,803,033.09
  5. Step 5: Solve for x
    x = 327,576,803,033.09/641,756.64
  6. Step 6: Final answer
    x = 510,437.73

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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.