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Finding the Fourth Proportional to 489,431, 734,058.70 and 129,604.12

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Solution

The fourth proportional to 489,431, 734,058.70 and 129,604.12 is: 194,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,431 : 734,058.70 = 129,604.12 : x
  2. Step 2: Convert to fraction form
    489,431/734,058.70 = 129,604.12/x
  3. Step 3: Cross multiply
    489,431x = 734,058.70 × 129,604.12
  4. Step 4: Simplify right side
    489,431x = 95,137,031,841.84
  5. Step 5: Solve for x
    x = 95,137,031,841.84/489,431
  6. Step 6: Final answer
    x = 194,382.93

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1.5x scale

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.