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Finding the Fourth Proportional to 445,547.80, 668,321.70 and 209,351.80

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Solution

The fourth proportional to 445,547.80, 668,321.70 and 209,351.80 is: 314,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,547.80 : 668,321.70 = 209,351.80 : x
  2. Step 2: Convert to fraction form
    445,547.80/668,321.70 = 209,351.80/x
  3. Step 3: Cross multiply
    445,547.80x = 668,321.70 × 209,351.80
  4. Step 4: Simplify right side
    445,547.80x = 139,914,350,874.06
  5. Step 5: Solve for x
    x = 139,914,350,874.06/445,547.80
  6. Step 6: Final answer
    x = 314,027.70

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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.