Home / 686,538.20-1,030,001.70-213,271.40

Finding the Fourth Proportional to 686,538.20, 1,030,001.70 and 213,271.40

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Solution

The fourth proportional to 686,538.20, 1,030,001.70 and 213,271.40 is: 319,967.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,538.20 : 1,030,001.70 = 213,271.40 : x
  2. Step 2: Convert to fraction form
    686,538.20/1,030,001.70 = 213,271.40/x
  3. Step 3: Cross multiply
    686,538.20x = 1,030,001.70 × 213,271.40
  4. Step 4: Simplify right side
    686,538.20x = 219,669,904,561.38
  5. Step 5: Solve for x
    x = 219,669,904,561.38/686,538.20
  6. Step 6: Final answer
    x = 319,967.49

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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.