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Finding the Fourth Proportional to 445,371.70, 668,057.55 and 390,075.70

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Solution

The fourth proportional to 445,371.70, 668,057.55 and 390,075.70 is: 585,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,371.70 : 668,057.55 = 390,075.70 : x
  2. Step 2: Convert to fraction form
    445,371.70/668,057.55 = 390,075.70/x
  3. Step 3: Cross multiply
    445,371.70x = 668,057.55 × 390,075.70
  4. Step 4: Simplify right side
    445,371.70x = 260,593,016,456.54
  5. Step 5: Solve for x
    x = 260,593,016,456.54/445,371.70
  6. Step 6: Final answer
    x = 585,113.55

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Similar ratio
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1.5x scale

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.