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Finding the Fourth Proportional to 710,326.79, 980,238.61 and 388,028.60

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Solution

The fourth proportional to 710,326.79, 980,238.61 and 388,028.60 is: 535,472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,326.79 : 980,238.61 = 388,028.60 : x
  2. Step 2: Convert to fraction form
    710,326.79/980,238.61 = 388,028.60/x
  3. Step 3: Cross multiply
    710,326.79x = 980,238.61 × 388,028.60
  4. Step 4: Simplify right side
    710,326.79x = 380,360,615,504.25
  5. Step 5: Solve for x
    x = 380,360,615,504.25/710,326.79
  6. Step 6: Final answer
    x = 535,472.72

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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.