Home / 687,856.80-1,031,785.20-214,541.40

Finding the Fourth Proportional to 687,856.80, 1,031,785.20 and 214,541.40

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Solution

The fourth proportional to 687,856.80, 1,031,785.20 and 214,541.40 is: 321,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,856.80 : 1,031,785.20 = 214,541.40 : x
  2. Step 2: Convert to fraction form
    687,856.80/1,031,785.20 = 214,541.40/x
  3. Step 3: Cross multiply
    687,856.80x = 1,031,785.20 × 214,541.40
  4. Step 4: Simplify right side
    687,856.80x = 221,360,641,307.28
  5. Step 5: Solve for x
    x = 221,360,641,307.28/687,856.80
  6. Step 6: Final answer
    x = 321,812.10

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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.