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Finding the Fourth Proportional to 709,628, 979,326.60 and 407,841.44

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Solution

The fourth proportional to 709,628, 979,326.60 and 407,841.44 is: 562,844.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,628 : 979,326.60 = 407,841.44 : x
  2. Step 2: Convert to fraction form
    709,628/979,326.60 = 407,841.44/x
  3. Step 3: Cross multiply
    709,628x = 979,326.60 × 407,841.44
  4. Step 4: Simplify right side
    709,628x = 399,409,970,774.30
  5. Step 5: Solve for x
    x = 399,409,970,774.30/709,628
  6. Step 6: Final answer
    x = 562,844.15

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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.