Home / 655,919.20-899,264.40-643,961.76

Finding the Fourth Proportional to 655,919.20, 899,264.40 and 643,961.76

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Solution

The fourth proportional to 655,919.20, 899,264.40 and 643,961.76 is: 882,870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,919.20 : 899,264.40 = 643,961.76 : x
  2. Step 2: Convert to fraction form
    655,919.20/899,264.40 = 643,961.76/x
  3. Step 3: Cross multiply
    655,919.20x = 899,264.40 × 643,961.76
  4. Step 4: Simplify right side
    655,919.20x = 579,091,885,729.34
  5. Step 5: Solve for x
    x = 579,091,885,729.34/655,919.20
  6. Step 6: Final answer
    x = 882,870.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.