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Finding the Fourth Proportional to 518,399.04, 714,916.20 and 355,292.58

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Solution

The fourth proportional to 518,399.04, 714,916.20 and 355,292.58 is: 489,978.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,399.04 : 714,916.20 = 355,292.58 : x
  2. Step 2: Convert to fraction form
    518,399.04/714,916.20 = 355,292.58/x
  3. Step 3: Cross multiply
    518,399.04x = 714,916.20 × 355,292.58
  4. Step 4: Simplify right side
    518,399.04x = 254,004,421,181.80
  5. Step 5: Solve for x
    x = 254,004,421,181.80/518,399.04
  6. Step 6: Final answer
    x = 489,978.57

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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.