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Finding the Fourth Proportional to 339,407.16, 508,692.78 and 139,602.84

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Solution

The fourth proportional to 339,407.16, 508,692.78 and 139,602.84 is: 209,232.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,407.16 : 508,692.78 = 139,602.84 : x
  2. Step 2: Convert to fraction form
    339,407.16/508,692.78 = 139,602.84/x
  3. Step 3: Cross multiply
    339,407.16x = 508,692.78 × 139,602.84
  4. Step 4: Simplify right side
    339,407.16x = 71,014,956,775.50
  5. Step 5: Solve for x
    x = 71,014,956,775.50/339,407.16
  6. Step 6: Final answer
    x = 209,232.35

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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.