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Finding the Fourth Proportional to 364,054.80, 545,693.40 and 139,328.40

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Solution

The fourth proportional to 364,054.80, 545,693.40 and 139,328.40 is: 208,843.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,054.80 : 545,693.40 = 139,328.40 : x
  2. Step 2: Convert to fraction form
    364,054.80/545,693.40 = 139,328.40/x
  3. Step 3: Cross multiply
    364,054.80x = 545,693.40 × 139,328.40
  4. Step 4: Simplify right side
    364,054.80x = 76,030,588,312.56
  5. Step 5: Solve for x
    x = 76,030,588,312.56/364,054.80
  6. Step 6: Final answer
    x = 208,843.80

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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.