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Finding the Fourth Proportional to 659,492.20, 989,043.90 and 260,000.20

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Solution

The fourth proportional to 659,492.20, 989,043.90 and 260,000.20 is: 389,923.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,492.20 : 989,043.90 = 260,000.20 : x
  2. Step 2: Convert to fraction form
    659,492.20/989,043.90 = 260,000.20/x
  3. Step 3: Cross multiply
    659,492.20x = 989,043.90 × 260,000.20
  4. Step 4: Simplify right side
    659,492.20x = 257,151,611,808.78
  5. Step 5: Solve for x
    x = 257,151,611,808.78/659,492.20
  6. Step 6: Final answer
    x = 389,923.66

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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.