Home / 678,076.70-1,017,115.05-528,429.20

Finding the Fourth Proportional to 678,076.70, 1,017,115.05 and 528,429.20

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Solution

The fourth proportional to 678,076.70, 1,017,115.05 and 528,429.20 is: 792,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,076.70 : 1,017,115.05 = 528,429.20 : x
  2. Step 2: Convert to fraction form
    678,076.70/1,017,115.05 = 528,429.20/x
  3. Step 3: Cross multiply
    678,076.70x = 1,017,115.05 × 528,429.20
  4. Step 4: Simplify right side
    678,076.70x = 537,473,292,179.46
  5. Step 5: Solve for x
    x = 537,473,292,179.46/678,076.70
  6. Step 6: Final answer
    x = 792,643.80

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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.