Home / 420,839.40-631,259.10-210,401.40

Finding the Fourth Proportional to 420,839.40, 631,259.10 and 210,401.40

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Solution

The fourth proportional to 420,839.40, 631,259.10 and 210,401.40 is: 315,602.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,839.40 : 631,259.10 = 210,401.40 : x
  2. Step 2: Convert to fraction form
    420,839.40/631,259.10 = 210,401.40/x
  3. Step 3: Cross multiply
    420,839.40x = 631,259.10 × 210,401.40
  4. Step 4: Simplify right side
    420,839.40x = 132,817,798,402.74
  5. Step 5: Solve for x
    x = 132,817,798,402.74/420,839.40
  6. Step 6: Final answer
    x = 315,602.10

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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.