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Finding the Fourth Proportional to 460,385.40, 635,429.88 and 309,394.92

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Solution

The fourth proportional to 460,385.40, 635,429.88 and 309,394.92 is: 427,030.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,385.40 : 635,429.88 = 309,394.92 : x
  2. Step 2: Convert to fraction form
    460,385.40/635,429.88 = 309,394.92/x
  3. Step 3: Cross multiply
    460,385.40x = 635,429.88 × 309,394.92
  4. Step 4: Simplify right side
    460,385.40x = 196,598,776,888.21
  5. Step 5: Solve for x
    x = 196,598,776,888.21/460,385.40
  6. Step 6: Final answer
    x = 427,030.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.