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Finding the Fourth Proportional to 309,630.45, 432,957.75 and 309,630.45

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Solution

The fourth proportional to 309,630.45, 432,957.75 and 309,630.45 is: 432,957.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,630.45 : 432,957.75 = 309,630.45 : x
  2. Step 2: Convert to fraction form
    309,630.45/432,957.75 = 309,630.45/x
  3. Step 3: Cross multiply
    309,630.45x = 432,957.75 × 309,630.45
  4. Step 4: Simplify right side
    309,630.45x = 134,056,902,963.49
  5. Step 5: Solve for x
    x = 134,056,902,963.49/309,630.45
  6. Step 6: Final answer
    x = 432,957.75

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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.