Home / 678,920.90-1,018,528.23-258,204.74

Finding the Fourth Proportional to 678,920.90, 1,018,528.23 and 258,204.74

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Solution

The fourth proportional to 678,920.90, 1,018,528.23 and 258,204.74 is: 387,362.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,920.90 : 1,018,528.23 = 258,204.74 : x
  2. Step 2: Convert to fraction form
    678,920.90/1,018,528.23 = 258,204.74/x
  3. Step 3: Cross multiply
    678,920.90x = 1,018,528.23 × 258,204.74
  4. Step 4: Simplify right side
    678,920.90x = 262,988,816,809.81
  5. Step 5: Solve for x
    x = 262,988,816,809.81/678,920.90
  6. Step 6: Final answer
    x = 387,362.97

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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.