Home / 678,837.70-1,018,912.65-413,117.20

Finding the Fourth Proportional to 678,837.70, 1,018,912.65 and 413,117.20

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Solution

The fourth proportional to 678,837.70, 1,018,912.65 and 413,117.20 is: 620,075.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,837.70 : 1,018,912.65 = 413,117.20 : x
  2. Step 2: Convert to fraction form
    678,837.70/1,018,912.65 = 413,117.20/x
  3. Step 3: Cross multiply
    678,837.70x = 1,018,912.65 × 413,117.20
  4. Step 4: Simplify right side
    678,837.70x = 420,930,341,012.58
  5. Step 5: Solve for x
    x = 420,930,341,012.58/678,837.70
  6. Step 6: Final answer
    x = 620,075.08

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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.