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Finding the Fourth Proportional to 641,567.78, 885,285.86 and 369,724.76

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Solution

The fourth proportional to 641,567.78, 885,285.86 and 369,724.76 is: 510,175.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,567.78 : 885,285.86 = 369,724.76 : x
  2. Step 2: Convert to fraction form
    641,567.78/885,285.86 = 369,724.76/x
  3. Step 3: Cross multiply
    641,567.78x = 885,285.86 × 369,724.76
  4. Step 4: Simplify right side
    641,567.78x = 327,312,102,119.89
  5. Step 5: Solve for x
    x = 327,312,102,119.89/641,567.78
  6. Step 6: Final answer
    x = 510,175.41

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Double scale
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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.