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Finding the Fourth Proportional to 559,181.49, 771,692.30 and 317,486.55

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Solution

The fourth proportional to 559,181.49, 771,692.30 and 317,486.55 is: 438,143.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,181.49 : 771,692.30 = 317,486.55 : x
  2. Step 2: Convert to fraction form
    559,181.49/771,692.30 = 317,486.55/x
  3. Step 3: Cross multiply
    559,181.49x = 771,692.30 × 317,486.55
  4. Step 4: Simplify right side
    559,181.49x = 245,001,925,988.57
  5. Step 5: Solve for x
    x = 245,001,925,988.57/559,181.49
  6. Step 6: Final answer
    x = 438,143.84

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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.