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Finding the Fourth Proportional to 608,978.16, 840,468.38 and 367,391.21

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Solution

The fourth proportional to 608,978.16, 840,468.38 and 367,391.21 is: 507,047.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,978.16 : 840,468.38 = 367,391.21 : x
  2. Step 2: Convert to fraction form
    608,978.16/840,468.38 = 367,391.21/x
  3. Step 3: Cross multiply
    608,978.16x = 840,468.38 × 367,391.21
  4. Step 4: Simplify right side
    608,978.16x = 308,780,689,055.64
  5. Step 5: Solve for x
    x = 308,780,689,055.64/608,978.16
  6. Step 6: Final answer
    x = 507,047.23

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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.