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Finding the Fourth Proportional to 476,636.99, 715,053.96 and 139,688.69

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Solution

The fourth proportional to 476,636.99, 715,053.96 and 139,688.69 is: 209,561.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,636.99 : 715,053.96 = 139,688.69 : x
  2. Step 2: Convert to fraction form
    476,636.99/715,053.96 = 139,688.69/x
  3. Step 3: Cross multiply
    476,636.99x = 715,053.96 × 139,688.69
  4. Step 4: Simplify right side
    476,636.99x = 99,884,947,376.44
  5. Step 5: Solve for x
    x = 99,884,947,376.44/476,636.99
  6. Step 6: Final answer
    x = 209,561.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.