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Finding the Fourth Proportional to 508,516.16, 763,020 and 209,217.60

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Solution

The fourth proportional to 508,516.16, 763,020 and 209,217.60 is: 313,927.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,516.16 : 763,020 = 209,217.60 : x
  2. Step 2: Convert to fraction form
    508,516.16/763,020 = 209,217.60/x
  3. Step 3: Cross multiply
    508,516.16x = 763,020 × 209,217.60
  4. Step 4: Simplify right side
    508,516.16x = 159,637,213,152
  5. Step 5: Solve for x
    x = 159,637,213,152/508,516.16
  6. Step 6: Final answer
    x = 313,927.51

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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.