Home / 678,640.80-1,017,961.20-346,864.80

Finding the Fourth Proportional to 678,640.80, 1,017,961.20 and 346,864.80

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Solution

The fourth proportional to 678,640.80, 1,017,961.20 and 346,864.80 is: 520,297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,640.80 : 1,017,961.20 = 346,864.80 : x
  2. Step 2: Convert to fraction form
    678,640.80/1,017,961.20 = 346,864.80/x
  3. Step 3: Cross multiply
    678,640.80x = 1,017,961.20 × 346,864.80
  4. Step 4: Simplify right side
    678,640.80x = 353,094,908,045.76
  5. Step 5: Solve for x
    x = 353,094,908,045.76/678,640.80
  6. Step 6: Final answer
    x = 520,297.20

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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.