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Finding the Fourth Proportional to 710,330.28, 980,243.43 and 388,032.09

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Solution

The fourth proportional to 710,330.28, 980,243.43 and 388,032.09 is: 535,477.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,330.28 : 980,243.43 = 388,032.09 : x
  2. Step 2: Convert to fraction form
    710,330.28/980,243.43 = 388,032.09/x
  3. Step 3: Cross multiply
    710,330.28x = 980,243.43 × 388,032.09
  4. Step 4: Simplify right side
    710,330.28x = 380,365,906,851.67
  5. Step 5: Solve for x
    x = 380,365,906,851.67/710,330.28
  6. Step 6: Final answer
    x = 535,477.53

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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.