Home / 686,594.70-1,029,892.05-213,276.30

Finding the Fourth Proportional to 686,594.70, 1,029,892.05 and 213,276.30

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Solution

The fourth proportional to 686,594.70, 1,029,892.05 and 213,276.30 is: 319,914.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,594.70 : 1,029,892.05 = 213,276.30 : x
  2. Step 2: Convert to fraction form
    686,594.70/1,029,892.05 = 213,276.30/x
  3. Step 3: Cross multiply
    686,594.70x = 1,029,892.05 × 213,276.30
  4. Step 4: Simplify right side
    686,594.70x = 219,651,565,823.42
  5. Step 5: Solve for x
    x = 219,651,565,823.42/686,594.70
  6. Step 6: Final answer
    x = 319,914.45

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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.