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Finding the Fourth Proportional to 389,012.90, 536,317.88 and 291,803.54

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Solution

The fourth proportional to 389,012.90, 536,317.88 and 291,803.54 is: 402,298.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,012.90 : 536,317.88 = 291,803.54 : x
  2. Step 2: Convert to fraction form
    389,012.90/536,317.88 = 291,803.54/x
  3. Step 3: Cross multiply
    389,012.90x = 536,317.88 × 291,803.54
  4. Step 4: Simplify right side
    389,012.90x = 156,499,455,949.30
  5. Step 5: Solve for x
    x = 156,499,455,949.30/389,012.90
  6. Step 6: Final answer
    x = 402,298.89

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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.