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Finding the Fourth Proportional to 608,090.22, 912,284 and 428,525.91

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Solution

The fourth proportional to 608,090.22, 912,284 and 428,525.91 is: 642,893.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,090.22 : 912,284 = 428,525.91 : x
  2. Step 2: Convert to fraction form
    608,090.22/912,284 = 428,525.91/x
  3. Step 3: Cross multiply
    608,090.22x = 912,284 × 428,525.91
  4. Step 4: Simplify right side
    608,090.22x = 390,937,331,278.44
  5. Step 5: Solve for x
    x = 390,937,331,278.44/608,090.22
  6. Step 6: Final answer
    x = 642,893.63

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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.