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Finding the Fourth Proportional to 522,981.60, 784,990.80 and 257,042.40

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Solution

The fourth proportional to 522,981.60, 784,990.80 and 257,042.40 is: 385,818.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,981.60 : 784,990.80 = 257,042.40 : x
  2. Step 2: Convert to fraction form
    522,981.60/784,990.80 = 257,042.40/x
  3. Step 3: Cross multiply
    522,981.60x = 784,990.80 × 257,042.40
  4. Step 4: Simplify right side
    522,981.60x = 201,775,919,209.92
  5. Step 5: Solve for x
    x = 201,775,919,209.92/522,981.60
  6. Step 6: Final answer
    x = 385,818.39

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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.