Home / 684,421.45-1,026,289.54-211,045.30

Finding the Fourth Proportional to 684,421.45, 1,026,289.54 and 211,045.30

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Solution

The fourth proportional to 684,421.45, 1,026,289.54 and 211,045.30 is: 316,462.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,421.45 : 1,026,289.54 = 211,045.30 : x
  2. Step 2: Convert to fraction form
    684,421.45/1,026,289.54 = 211,045.30/x
  3. Step 3: Cross multiply
    684,421.45x = 1,026,289.54 × 211,045.30
  4. Step 4: Simplify right side
    684,421.45x = 216,593,583,856.16
  5. Step 5: Solve for x
    x = 216,593,583,856.16/684,421.45
  6. Step 6: Final answer
    x = 316,462.30

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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.