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Finding the Fourth Proportional to 389,010.90, 536,315.12 and 291,801.54

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Solution

The fourth proportional to 389,010.90, 536,315.12 and 291,801.54 is: 402,296.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,010.90 : 536,315.12 = 291,801.54 : x
  2. Step 2: Convert to fraction form
    389,010.90/536,315.12 = 291,801.54/x
  3. Step 3: Cross multiply
    389,010.90x = 536,315.12 × 291,801.54
  4. Step 4: Simplify right side
    389,010.90x = 156,497,577,941.29
  5. Step 5: Solve for x
    x = 156,497,577,941.29/389,010.90
  6. Step 6: Final answer
    x = 402,296.13

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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.