Home / 875,143.80-1,312,715.57-210,295.80

Finding the Fourth Proportional to 875,143.80, 1,312,715.57 and 210,295.80

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Solution

The fourth proportional to 875,143.80, 1,312,715.57 and 210,295.80 is: 315,443.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,143.80 : 1,312,715.57 = 210,295.80 : x
  2. Step 2: Convert to fraction form
    875,143.80/1,312,715.57 = 210,295.80/x
  3. Step 3: Cross multiply
    875,143.80x = 1,312,715.57 × 210,295.80
  4. Step 4: Simplify right side
    875,143.80x = 276,058,569,914.13
  5. Step 5: Solve for x
    x = 276,058,569,914.13/875,143.80
  6. Step 6: Final answer
    x = 315,443.67

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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.