Home / 428,975,279.20-643,630,880.40-156,373,602.40

Finding the Fourth Proportional to 428,975,279.20, 643,630,880.40 and 156,373,602.40

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Solution

The fourth proportional to 428,975,279.20, 643,630,880.40 and 156,373,602.40 is: 234,621,630.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,975,279.20 : 643,630,880.40 = 156,373,602.40 : x
  2. Step 2: Convert to fraction form
    428,975,279.20/643,630,880.40 = 156,373,602.40/x
  3. Step 3: Cross multiply
    428,975,279.20x = 643,630,880.40 × 156,373,602.40
  4. Step 4: Simplify right side
    428,975,279.20x = 100,646,879,384,031,552
  5. Step 5: Solve for x
    x = 100,646,879,384,031,552/428,975,279.20
  6. Step 6: Final answer
    x = 234,621,630.35

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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.