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Finding the Fourth Proportional to 605,051.40, 907,577.10 and 405,985.80

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Solution

The fourth proportional to 605,051.40, 907,577.10 and 405,985.80 is: 608,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,051.40 : 907,577.10 = 405,985.80 : x
  2. Step 2: Convert to fraction form
    605,051.40/907,577.10 = 405,985.80/x
  3. Step 3: Cross multiply
    605,051.40x = 907,577.10 × 405,985.80
  4. Step 4: Simplify right side
    605,051.40x = 368,463,415,005.18
  5. Step 5: Solve for x
    x = 368,463,415,005.18/605,051.40
  6. Step 6: Final answer
    x = 608,978.70

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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.