Home / 390,724.80-538,683.33-281,737.95

Finding the Fourth Proportional to 390,724.80, 538,683.33 and 281,737.95

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Solution

The fourth proportional to 390,724.80, 538,683.33 and 281,737.95 is: 388,425.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,724.80 : 538,683.33 = 281,737.95 : x
  2. Step 2: Convert to fraction form
    390,724.80/538,683.33 = 281,737.95/x
  3. Step 3: Cross multiply
    390,724.80x = 538,683.33 × 281,737.95
  4. Step 4: Simplify right side
    390,724.80x = 151,767,537,093.37
  5. Step 5: Solve for x
    x = 151,767,537,093.37/390,724.80
  6. Step 6: Final answer
    x = 388,425.66

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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.