Home / 578,619.20-867,928.80-485,307.20

Finding the Fourth Proportional to 578,619.20, 867,928.80 and 485,307.20

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Solution

The fourth proportional to 578,619.20, 867,928.80 and 485,307.20 is: 727,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,619.20 : 867,928.80 = 485,307.20 : x
  2. Step 2: Convert to fraction form
    578,619.20/867,928.80 = 485,307.20/x
  3. Step 3: Cross multiply
    578,619.20x = 867,928.80 × 485,307.20
  4. Step 4: Simplify right side
    578,619.20x = 421,212,095,727.36
  5. Step 5: Solve for x
    x = 421,212,095,727.36/578,619.20
  6. Step 6: Final answer
    x = 727,960.80

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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.