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Finding the Fourth Proportional to 585,990.50, 808,666.90 and 317,718.50

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Solution

The fourth proportional to 585,990.50, 808,666.90 and 317,718.50 is: 438,451.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,990.50 : 808,666.90 = 317,718.50 : x
  2. Step 2: Convert to fraction form
    585,990.50/808,666.90 = 317,718.50/x
  3. Step 3: Cross multiply
    585,990.50x = 808,666.90 × 317,718.50
  4. Step 4: Simplify right side
    585,990.50x = 256,928,434,467.65
  5. Step 5: Solve for x
    x = 256,928,434,467.65/585,990.50
  6. Step 6: Final answer
    x = 438,451.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.