Home / 428,975,003.20-643,630,466.40-156,373,326.40

Finding the Fourth Proportional to 428,975,003.20, 643,630,466.40 and 156,373,326.40

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Solution

The fourth proportional to 428,975,003.20, 643,630,466.40 and 156,373,326.40 is: 234,621,216.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,975,003.20 : 643,630,466.40 = 156,373,326.40 : x
  2. Step 2: Convert to fraction form
    428,975,003.20/643,630,466.40 = 156,373,326.40/x
  3. Step 3: Cross multiply
    428,975,003.20x = 643,630,466.40 × 156,373,326.40
  4. Step 4: Simplify right side
    428,975,003.20x = 100,646,637,003,351,440
  5. Step 5: Solve for x
    x = 100,646,637,003,351,440/428,975,003.20
  6. Step 6: Final answer
    x = 234,621,216.28

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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.