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Finding the Fourth Proportional to 430,809.85, 646,239.07 and 131,300.20

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Solution

The fourth proportional to 430,809.85, 646,239.07 and 131,300.20 is: 196,957.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,809.85 : 646,239.07 = 131,300.20 : x
  2. Step 2: Convert to fraction form
    430,809.85/646,239.07 = 131,300.20/x
  3. Step 3: Cross multiply
    430,809.85x = 646,239.07 × 131,300.20
  4. Step 4: Simplify right side
    430,809.85x = 84,851,318,477.83
  5. Step 5: Solve for x
    x = 84,851,318,477.83/430,809.85
  6. Step 6: Final answer
    x = 196,957.70

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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.