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Finding the Fourth Proportional to 489,465.40, 734,465.70 and 189,957.88

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Solution

The fourth proportional to 489,465.40, 734,465.70 and 189,957.88 is: 285,040.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,465.40 : 734,465.70 = 189,957.88 : x
  2. Step 2: Convert to fraction form
    489,465.40/734,465.70 = 189,957.88/x
  3. Step 3: Cross multiply
    489,465.40x = 734,465.70 × 189,957.88
  4. Step 4: Simplify right side
    489,465.40x = 139,517,547,304.72
  5. Step 5: Solve for x
    x = 139,517,547,304.72/489,465.40
  6. Step 6: Final answer
    x = 285,040.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.