Home / 420,869.40-631,304.10-210,431.40

Finding the Fourth Proportional to 420,869.40, 631,304.10 and 210,431.40

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Solution

The fourth proportional to 420,869.40, 631,304.10 and 210,431.40 is: 315,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,869.40 : 631,304.10 = 210,431.40 : x
  2. Step 2: Convert to fraction form
    420,869.40/631,304.10 = 210,431.40/x
  3. Step 3: Cross multiply
    420,869.40x = 631,304.10 × 210,431.40
  4. Step 4: Simplify right side
    420,869.40x = 132,846,205,588.74
  5. Step 5: Solve for x
    x = 132,846,205,588.74/420,869.40
  6. Step 6: Final answer
    x = 315,647.10

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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.