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Finding the Fourth Proportional to 388,464,010.60, 582,696,015.90 and 266,020,004.20

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Solution

The fourth proportional to 388,464,010.60, 582,696,015.90 and 266,020,004.20 is: 399,030,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,464,010.60 : 582,696,015.90 = 266,020,004.20 : x
  2. Step 2: Convert to fraction form
    388,464,010.60/582,696,015.90 = 266,020,004.20/x
  3. Step 3: Cross multiply
    388,464,010.60x = 582,696,015.90 × 266,020,004.20
  4. Step 4: Simplify right side
    388,464,010.60x = 155,008,796,597,041,248
  5. Step 5: Solve for x
    x = 155,008,796,597,041,248/388,464,010.60
  6. Step 6: Final answer
    x = 399,030,006.30

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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.