Home / 684,220.80-1,026,428.40-210,856.80

Finding the Fourth Proportional to 684,220.80, 1,026,428.40 and 210,856.80

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Solution

The fourth proportional to 684,220.80, 1,026,428.40 and 210,856.80 is: 316,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,220.80 : 1,026,428.40 = 210,856.80 : x
  2. Step 2: Convert to fraction form
    684,220.80/1,026,428.40 = 210,856.80/x
  3. Step 3: Cross multiply
    684,220.80x = 1,026,428.40 × 210,856.80
  4. Step 4: Simplify right side
    684,220.80x = 216,429,407,853.12
  5. Step 5: Solve for x
    x = 216,429,407,853.12/684,220.80
  6. Step 6: Final answer
    x = 316,315.15

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Half scale
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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.