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Finding the Fourth Proportional to 765,424.80, 1,147,618.80 and 405,655.20

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Solution

The fourth proportional to 765,424.80, 1,147,618.80 and 405,655.20 is: 608,208.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,424.80 : 1,147,618.80 = 405,655.20 : x
  2. Step 2: Convert to fraction form
    765,424.80/1,147,618.80 = 405,655.20/x
  3. Step 3: Cross multiply
    765,424.80x = 1,147,618.80 × 405,655.20
  4. Step 4: Simplify right side
    765,424.80x = 465,537,533,837.76
  5. Step 5: Solve for x
    x = 465,537,533,837.76/765,424.80
  6. Step 6: Final answer
    x = 608,208.06

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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.