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Finding the Fourth Proportional to 424,927.80, 637,391.70 and 129,401.40

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Solution

The fourth proportional to 424,927.80, 637,391.70 and 129,401.40 is: 194,102.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,927.80 : 637,391.70 = 129,401.40 : x
  2. Step 2: Convert to fraction form
    424,927.80/637,391.70 = 129,401.40/x
  3. Step 3: Cross multiply
    424,927.80x = 637,391.70 × 129,401.40
  4. Step 4: Simplify right side
    424,927.80x = 82,479,378,328.38
  5. Step 5: Solve for x
    x = 82,479,378,328.38/424,927.80
  6. Step 6: Final answer
    x = 194,102.10

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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.