Home / 686,590.20-1,030,079.70-213,323.40

Finding the Fourth Proportional to 686,590.20, 1,030,079.70 and 213,323.40

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Solution

The fourth proportional to 686,590.20, 1,030,079.70 and 213,323.40 is: 320,045.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,590.20 : 1,030,079.70 = 213,323.40 : x
  2. Step 2: Convert to fraction form
    686,590.20/1,030,079.70 = 213,323.40/x
  3. Step 3: Cross multiply
    686,590.20x = 1,030,079.70 × 213,323.40
  4. Step 4: Simplify right side
    686,590.20x = 219,740,103,874.98
  5. Step 5: Solve for x
    x = 219,740,103,874.98/686,590.20
  6. Step 6: Final answer
    x = 320,045.50

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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.