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Finding the Fourth Proportional to 662,478.49, 993,696.54 and 278,430.81

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Solution

The fourth proportional to 662,478.49, 993,696.54 and 278,430.81 is: 417,637.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,478.49 : 993,696.54 = 278,430.81 : x
  2. Step 2: Convert to fraction form
    662,478.49/993,696.54 = 278,430.81/x
  3. Step 3: Cross multiply
    662,478.49x = 993,696.54 × 278,430.81
  4. Step 4: Simplify right side
    662,478.49x = 276,675,732,526.40
  5. Step 5: Solve for x
    x = 276,675,732,526.40/662,478.49
  6. Step 6: Final answer
    x = 417,637.31

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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.