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Finding the Fourth Proportional to 710,619.27, 980,638.41 and 388,331.30

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Solution

The fourth proportional to 710,619.27, 980,638.41 and 388,331.30 is: 535,888.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,619.27 : 980,638.41 = 388,331.30 : x
  2. Step 2: Convert to fraction form
    710,619.27/980,638.41 = 388,331.30/x
  3. Step 3: Cross multiply
    710,619.27x = 980,638.41 × 388,331.30
  4. Step 4: Simplify right side
    710,619.27x = 380,812,588,585.23
  5. Step 5: Solve for x
    x = 380,812,588,585.23/710,619.27
  6. Step 6: Final answer
    x = 535,888.35

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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.