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Finding the Fourth Proportional to 662,386.69, 993,707.61 and 213,220.63

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Solution

The fourth proportional to 662,386.69, 993,707.61 and 213,220.63 is: 319,872.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,386.69 : 993,707.61 = 213,220.63 : x
  2. Step 2: Convert to fraction form
    662,386.69/993,707.61 = 213,220.63/x
  3. Step 3: Cross multiply
    662,386.69x = 993,707.61 × 213,220.63
  4. Step 4: Simplify right side
    662,386.69x = 211,878,962,639.99
  5. Step 5: Solve for x
    x = 211,878,962,639.99/662,386.69
  6. Step 6: Final answer
    x = 319,872.01

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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.