Home / 811,521,621-1,218,069,586.32-391,638,482.28

Finding the Fourth Proportional to 811,521,621, 1,218,069,586.32 and 391,638,482.28

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Solution

The fourth proportional to 811,521,621, 1,218,069,586.32 and 391,638,482.28 is: 587,837,602.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,521,621 : 1,218,069,586.32 = 391,638,482.28 : x
  2. Step 2: Convert to fraction form
    811,521,621/1,218,069,586.32 = 391,638,482.28/x
  3. Step 3: Cross multiply
    811,521,621x = 1,218,069,586.32 × 391,638,482.28
  4. Step 4: Simplify right side
    811,521,621x = 477,042,924,097,792,192
  5. Step 5: Solve for x
    x = 477,042,924,097,792,192/811,521,621
  6. Step 6: Final answer
    x = 587,837,602.54

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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.