Home / 513,216,005.20-769,824,007.80-319,346,328.40

Finding the Fourth Proportional to 513,216,005.20, 769,824,007.80 and 319,346,328.40

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Solution

The fourth proportional to 513,216,005.20, 769,824,007.80 and 319,346,328.40 is: 479,019,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,216,005.20 : 769,824,007.80 = 319,346,328.40 : x
  2. Step 2: Convert to fraction form
    513,216,005.20/769,824,007.80 = 319,346,328.40/x
  3. Step 3: Cross multiply
    513,216,005.20x = 769,824,007.80 × 319,346,328.40
  4. Step 4: Simplify right side
    513,216,005.20x = 245,840,470,405,102,912
  5. Step 5: Solve for x
    x = 245,840,470,405,102,912/513,216,005.20
  6. Step 6: Final answer
    x = 479,019,492.60

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1.5x scale

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.