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Finding the Fourth Proportional to 309,632.70, 432,960.90 and 309,632.70

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Solution

The fourth proportional to 309,632.70, 432,960.90 and 309,632.70 is: 432,960.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,632.70 : 432,960.90 = 309,632.70 : x
  2. Step 2: Convert to fraction form
    309,632.70/432,960.90 = 309,632.70/x
  3. Step 3: Cross multiply
    309,632.70x = 432,960.90 × 309,632.70
  4. Step 4: Simplify right side
    309,632.70x = 134,058,852,461.43
  5. Step 5: Solve for x
    x = 134,058,852,461.43/309,632.70
  6. Step 6: Final answer
    x = 432,960.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.