Home / 642,637.60-963,956.40-406,441.60

Finding the Fourth Proportional to 642,637.60, 963,956.40 and 406,441.60

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Solution

The fourth proportional to 642,637.60, 963,956.40 and 406,441.60 is: 609,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,637.60 : 963,956.40 = 406,441.60 : x
  2. Step 2: Convert to fraction form
    642,637.60/963,956.40 = 406,441.60/x
  3. Step 3: Cross multiply
    642,637.60x = 963,956.40 × 406,441.60
  4. Step 4: Simplify right side
    642,637.60x = 391,791,981,546.24
  5. Step 5: Solve for x
    x = 391,791,981,546.24/642,637.60
  6. Step 6: Final answer
    x = 609,662.40

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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.