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Finding the Fourth Proportional to 445,566.40, 668,349.60 and 391,328.80

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Solution

The fourth proportional to 445,566.40, 668,349.60 and 391,328.80 is: 586,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,566.40 : 668,349.60 = 391,328.80 : x
  2. Step 2: Convert to fraction form
    445,566.40/668,349.60 = 391,328.80/x
  3. Step 3: Cross multiply
    445,566.40x = 668,349.60 × 391,328.80
  4. Step 4: Simplify right side
    445,566.40x = 261,544,446,948.48
  5. Step 5: Solve for x
    x = 261,544,446,948.48/445,566.40
  6. Step 6: Final answer
    x = 586,993.20

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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.