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Finding the Fourth Proportional to 210,009,607.20, 315,014,410.80 and 190,861,984.80

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Solution

The fourth proportional to 210,009,607.20, 315,014,410.80 and 190,861,984.80 is: 286,292,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,009,607.20 : 315,014,410.80 = 190,861,984.80 : x
  2. Step 2: Convert to fraction form
    210,009,607.20/315,014,410.80 = 190,861,984.80/x
  3. Step 3: Cross multiply
    210,009,607.20x = 315,014,410.80 × 190,861,984.80
  4. Step 4: Simplify right side
    210,009,607.20x = 60,124,275,685,890,560
  5. Step 5: Solve for x
    x = 60,124,275,685,890,560/210,009,607.20
  6. Step 6: Final answer
    x = 286,292,977.20

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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.