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Finding the Fourth Proportional to 398,971,570.80, 598,457,356.20 and 381,965,458.80

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Solution

The fourth proportional to 398,971,570.80, 598,457,356.20 and 381,965,458.80 is: 572,948,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,971,570.80 : 598,457,356.20 = 381,965,458.80 : x
  2. Step 2: Convert to fraction form
    398,971,570.80/598,457,356.20 = 381,965,458.80/x
  3. Step 3: Cross multiply
    398,971,570.80x = 598,457,356.20 × 381,965,458.80
  4. Step 4: Simplify right side
    398,971,570.80x = 228,590,038,633,168,064
  5. Step 5: Solve for x
    x = 228,590,038,633,168,064/398,971,570.80
  6. Step 6: Final answer
    x = 572,948,188.20

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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.