Home / 643,446.10-887,586.70-401,308.29

Finding the Fourth Proportional to 643,446.10, 887,586.70 and 401,308.29

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Solution

The fourth proportional to 643,446.10, 887,586.70 and 401,308.29 is: 553,575.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,446.10 : 887,586.70 = 401,308.29 : x
  2. Step 2: Convert to fraction form
    643,446.10/887,586.70 = 401,308.29/x
  3. Step 3: Cross multiply
    643,446.10x = 887,586.70 × 401,308.29
  4. Step 4: Simplify right side
    643,446.10x = 356,195,900,803.74
  5. Step 5: Solve for x
    x = 356,195,900,803.74/643,446.10
  6. Step 6: Final answer
    x = 553,575.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.