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Finding the Fourth Proportional to 388,940.80, 583,411.20 and 326,732.80

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Solution

The fourth proportional to 388,940.80, 583,411.20 and 326,732.80 is: 490,099.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940.80 : 583,411.20 = 326,732.80 : x
  2. Step 2: Convert to fraction form
    388,940.80/583,411.20 = 326,732.80/x
  3. Step 3: Cross multiply
    388,940.80x = 583,411.20 × 326,732.80
  4. Step 4: Simplify right side
    388,940.80x = 190,619,574,927.36
  5. Step 5: Solve for x
    x = 190,619,574,927.36/388,940.80
  6. Step 6: Final answer
    x = 490,099.20

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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.