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Finding the Fourth Proportional to 261,403.25, 390,334.25 and 207,490.37

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Solution

The fourth proportional to 261,403.25, 390,334.25 and 207,490.37 is: 309,830.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,403.25 : 390,334.25 = 207,490.37 : x
  2. Step 2: Convert to fraction form
    261,403.25/390,334.25 = 207,490.37/x
  3. Step 3: Cross multiply
    261,403.25x = 390,334.25 × 207,490.37
  4. Step 4: Simplify right side
    261,403.25x = 80,990,594,967.05
  5. Step 5: Solve for x
    x = 80,990,594,967.05/261,403.25
  6. Step 6: Final answer
    x = 309,830.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.