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Finding the Fourth Proportional to 659,680.80, 989,715.60 and 210,465.60

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Solution

The fourth proportional to 659,680.80, 989,715.60 and 210,465.60 is: 315,760.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,680.80 : 989,715.60 = 210,465.60 : x
  2. Step 2: Convert to fraction form
    659,680.80/989,715.60 = 210,465.60/x
  3. Step 3: Cross multiply
    659,680.80x = 989,715.60 × 210,465.60
  4. Step 4: Simplify right side
    659,680.80x = 208,301,087,583.36
  5. Step 5: Solve for x
    x = 208,301,087,583.36/659,680.80
  6. Step 6: Final answer
    x = 315,760.42

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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.