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Finding the Fourth Proportional to 710,601.80, 980,643.31 and 388,325.48

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Solution

The fourth proportional to 710,601.80, 980,643.31 and 388,325.48 is: 535,896.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,601.80 : 980,643.31 = 388,325.48 : x
  2. Step 2: Convert to fraction form
    710,601.80/980,643.31 = 388,325.48/x
  3. Step 3: Cross multiply
    710,601.80x = 980,643.31 × 388,325.48
  4. Step 4: Simplify right side
    710,601.80x = 380,808,778,190.51
  5. Step 5: Solve for x
    x = 380,808,778,190.51/710,601.80
  6. Step 6: Final answer
    x = 535,896.17

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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.