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Finding the Fourth Proportional to 660,070.39, 910,865.63 and 405,372.37

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Solution

The fourth proportional to 660,070.39, 910,865.63 and 405,372.37 is: 559,394.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,070.39 : 910,865.63 = 405,372.37 : x
  2. Step 2: Convert to fraction form
    660,070.39/910,865.63 = 405,372.37/x
  3. Step 3: Cross multiply
    660,070.39x = 910,865.63 × 405,372.37
  4. Step 4: Simplify right side
    660,070.39x = 369,239,759,184.64
  5. Step 5: Solve for x
    x = 369,239,759,184.64/660,070.39
  6. Step 6: Final answer
    x = 559,394.52

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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.