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Finding the Fourth Proportional to 298,865.61, 448,054.11 and 139,041.18

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Solution

The fourth proportional to 298,865.61, 448,054.11 and 139,041.18 is: 208,448.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,865.61 : 448,054.11 = 139,041.18 : x
  2. Step 2: Convert to fraction form
    298,865.61/448,054.11 = 139,041.18/x
  3. Step 3: Cross multiply
    298,865.61x = 448,054.11 × 139,041.18
  4. Step 4: Simplify right side
    298,865.61x = 62,297,972,158.25
  5. Step 5: Solve for x
    x = 62,297,972,158.25/298,865.61
  6. Step 6: Final answer
    x = 208,448.11

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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.