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Finding the Fourth Proportional to 665,028.47, 915,806.30 and 577,773.20

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Solution

The fourth proportional to 665,028.47, 915,806.30 and 577,773.20 is: 795,647.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,028.47 : 915,806.30 = 577,773.20 : x
  2. Step 2: Convert to fraction form
    665,028.47/915,806.30 = 577,773.20/x
  3. Step 3: Cross multiply
    665,028.47x = 915,806.30 × 577,773.20
  4. Step 4: Simplify right side
    665,028.47x = 529,128,329,063.26
  5. Step 5: Solve for x
    x = 529,128,329,063.26/665,028.47
  6. Step 6: Final answer
    x = 795,647.64

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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.