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Finding the Fourth Proportional to 659,436.80, 989,414.40 and 260,009.60

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Solution

The fourth proportional to 659,436.80, 989,414.40 and 260,009.60 is: 390,116.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,436.80 : 989,414.40 = 260,009.60 : x
  2. Step 2: Convert to fraction form
    659,436.80/989,414.40 = 260,009.60/x
  3. Step 3: Cross multiply
    659,436.80x = 989,414.40 × 260,009.60
  4. Step 4: Simplify right side
    659,436.80x = 257,257,242,378.24
  5. Step 5: Solve for x
    x = 257,257,242,378.24/659,436.80
  6. Step 6: Final answer
    x = 390,116.60

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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.