Home / 778,494,428.65-1,074,325,158.81-421,262,208.52

Finding the Fourth Proportional to 778,494,428.65, 1,074,325,158.81 and 421,262,208.52

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Solution

The fourth proportional to 778,494,428.65, 1,074,325,158.81 and 421,262,208.52 is: 581,343,388.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,494,428.65 : 1,074,325,158.81 = 421,262,208.52 : x
  2. Step 2: Convert to fraction form
    778,494,428.65/1,074,325,158.81 = 421,262,208.52/x
  3. Step 3: Cross multiply
    778,494,428.65x = 1,074,325,158.81 × 421,262,208.52
  4. Step 4: Simplify right side
    778,494,428.65x = 452,572,589,068,900,288
  5. Step 5: Solve for x
    x = 452,572,589,068,900,288/778,494,428.65
  6. Step 6: Final answer
    x = 581,343,388.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.