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Finding the Fourth Proportional to 710,726.94, 980,800.81 and 388,436.94

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Solution

The fourth proportional to 710,726.94, 980,800.81 and 388,436.94 is: 536,041.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,726.94 : 980,800.81 = 388,436.94 : x
  2. Step 2: Convert to fraction form
    710,726.94/980,800.81 = 388,436.94/x
  3. Step 3: Cross multiply
    710,726.94x = 980,800.81 × 388,436.94
  4. Step 4: Simplify right side
    710,726.94x = 380,979,264,414.83
  5. Step 5: Solve for x
    x = 380,979,264,414.83/710,726.94
  6. Step 6: Final answer
    x = 536,041.68

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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.