Home / 520,117,929.80-780,176,894.70-213,630,000.20

Finding the Fourth Proportional to 520,117,929.80, 780,176,894.70 and 213,630,000.20

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Solution

The fourth proportional to 520,117,929.80, 780,176,894.70 and 213,630,000.20 is: 320,445,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,117,929.80 : 780,176,894.70 = 213,630,000.20 : x
  2. Step 2: Convert to fraction form
    520,117,929.80/780,176,894.70 = 213,630,000.20/x
  3. Step 3: Cross multiply
    520,117,929.80x = 780,176,894.70 × 213,630,000.20
  4. Step 4: Simplify right side
    520,117,929.80x = 166,669,190,170,796,384
  5. Step 5: Solve for x
    x = 166,669,190,170,796,384/520,117,929.80
  6. Step 6: Final answer
    x = 320,445,000.30

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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.