Home / 678,139.40-1,017,792.30-299,642.60

Finding the Fourth Proportional to 678,139.40, 1,017,792.30 and 299,642.60

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Solution

The fourth proportional to 678,139.40, 1,017,792.30 and 299,642.60 is: 449,721.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,139.40 : 1,017,792.30 = 299,642.60 : x
  2. Step 2: Convert to fraction form
    678,139.40/1,017,792.30 = 299,642.60/x
  3. Step 3: Cross multiply
    678,139.40x = 1,017,792.30 × 299,642.60
  4. Step 4: Simplify right side
    678,139.40x = 304,973,931,031.98
  5. Step 5: Solve for x
    x = 304,973,931,031.98/678,139.40
  6. Step 6: Final answer
    x = 449,721.59

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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.