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Finding the Fourth Proportional to 666,427.97, 918,714.06 and 475,109.21

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Solution

The fourth proportional to 666,427.97, 918,714.06 and 475,109.21 is: 654,968.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,427.97 : 918,714.06 = 475,109.21 : x
  2. Step 2: Convert to fraction form
    666,427.97/918,714.06 = 475,109.21/x
  3. Step 3: Cross multiply
    666,427.97x = 918,714.06 × 475,109.21
  4. Step 4: Simplify right side
    666,427.97x = 436,489,506,668.92
  5. Step 5: Solve for x
    x = 436,489,506,668.92/666,427.97
  6. Step 6: Final answer
    x = 654,968.77

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1.5x scale

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.