Home / 688,655.40-1,032,983.10-215,485.80

Finding the Fourth Proportional to 688,655.40, 1,032,983.10 and 215,485.80

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Solution

The fourth proportional to 688,655.40, 1,032,983.10 and 215,485.80 is: 323,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,655.40 : 1,032,983.10 = 215,485.80 : x
  2. Step 2: Convert to fraction form
    688,655.40/1,032,983.10 = 215,485.80/x
  3. Step 3: Cross multiply
    688,655.40x = 1,032,983.10 × 215,485.80
  4. Step 4: Simplify right side
    688,655.40x = 222,593,189,689.98
  5. Step 5: Solve for x
    x = 222,593,189,689.98/688,655.40
  6. Step 6: Final answer
    x = 323,228.70

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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.