Home / 678,853.80-1,018,280.70-668,356.20

Finding the Fourth Proportional to 678,853.80, 1,018,280.70 and 668,356.20

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Solution

The fourth proportional to 678,853.80, 1,018,280.70 and 668,356.20 is: 1,002,534.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,853.80 : 1,018,280.70 = 668,356.20 : x
  2. Step 2: Convert to fraction form
    678,853.80/1,018,280.70 = 668,356.20/x
  3. Step 3: Cross multiply
    678,853.80x = 1,018,280.70 × 668,356.20
  4. Step 4: Simplify right side
    678,853.80x = 680,574,219,185.34
  5. Step 5: Solve for x
    x = 680,574,219,185.34/678,853.80
  6. Step 6: Final answer
    x = 1,002,534.30

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Double scale
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Similar ratio
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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.