Home / 1,211,689.40-1,817,534.10-413,871.80

Finding the Fourth Proportional to 1,211,689.40, 1,817,534.10 and 413,871.80

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Solution

The fourth proportional to 1,211,689.40, 1,817,534.10 and 413,871.80 is: 620,807.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,689.40 : 1,817,534.10 = 413,871.80 : x
  2. Step 2: Convert to fraction form
    1,211,689.40/1,817,534.10 = 413,871.80/x
  3. Step 3: Cross multiply
    1,211,689.40x = 1,817,534.10 × 413,871.80
  4. Step 4: Simplify right side
    1,211,689.40x = 752,226,109,528.38
  5. Step 5: Solve for x
    x = 752,226,109,528.38/1,211,689.40
  6. Step 6: Final answer
    x = 620,807.70

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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.