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Finding the Fourth Proportional to 512,460,412.80, 768,615,969.60 and 148,916,860.80

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Solution

The fourth proportional to 512,460,412.80, 768,615,969.60 and 148,916,860.80 is: 223,353,598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,460,412.80 : 768,615,969.60 = 148,916,860.80 : x
  2. Step 2: Convert to fraction form
    512,460,412.80/768,615,969.60 = 148,916,860.80/x
  3. Step 3: Cross multiply
    512,460,412.80x = 768,615,969.60 × 148,916,860.80
  4. Step 4: Simplify right side
    512,460,412.80x = 114,459,877,353,580,240
  5. Step 5: Solve for x
    x = 114,459,877,353,580,240/512,460,412.80
  6. Step 6: Final answer
    x = 223,353,598.63

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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.