Home / 678,664,430.40-1,018,527,487.20-315,203,822.40

Finding the Fourth Proportional to 678,664,430.40, 1,018,527,487.20 and 315,203,822.40

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Solution

The fourth proportional to 678,664,430.40, 1,018,527,487.20 and 315,203,822.40 is: 473,052,281.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,664,430.40 : 1,018,527,487.20 = 315,203,822.40 : x
  2. Step 2: Convert to fraction form
    678,664,430.40/1,018,527,487.20 = 315,203,822.40/x
  3. Step 3: Cross multiply
    678,664,430.40x = 1,018,527,487.20 × 315,203,822.40
  4. Step 4: Simplify right side
    678,664,430.40x = 321,043,757,184,907,072
  5. Step 5: Solve for x
    x = 321,043,757,184,907,072/678,664,430.40
  6. Step 6: Final answer
    x = 473,052,281.52

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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.