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Finding the Fourth Proportional to 484,357.49, 668,505.90 and 320,725.40

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Solution

The fourth proportional to 484,357.49, 668,505.90 and 320,725.40 is: 442,662.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,357.49 : 668,505.90 = 320,725.40 : x
  2. Step 2: Convert to fraction form
    484,357.49/668,505.90 = 320,725.40/x
  3. Step 3: Cross multiply
    484,357.49x = 668,505.90 × 320,725.40
  4. Step 4: Simplify right side
    484,357.49x = 214,406,818,837.33
  5. Step 5: Solve for x
    x = 214,406,818,837.33/484,357.49
  6. Step 6: Final answer
    x = 442,662.34

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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.