Home / 678,822.83-1,018,663.78-379,499.76

Finding the Fourth Proportional to 678,822.83, 1,018,663.78 and 379,499.76

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Solution

The fourth proportional to 678,822.83, 1,018,663.78 and 379,499.76 is: 569,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,822.83 : 1,018,663.78 = 379,499.76 : x
  2. Step 2: Convert to fraction form
    678,822.83/1,018,663.78 = 379,499.76/x
  3. Step 3: Cross multiply
    678,822.83x = 1,018,663.78 × 379,499.76
  4. Step 4: Simplify right side
    678,822.83x = 386,582,658,529.51
  5. Step 5: Solve for x
    x = 386,582,658,529.51/678,822.83
  6. Step 6: Final answer
    x = 569,489.77

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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.