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Finding the Fourth Proportional to 486,056.40, 681,178.80 and 486,056.40

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Solution

The fourth proportional to 486,056.40, 681,178.80 and 486,056.40 is: 681,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,056.40 : 681,178.80 = 486,056.40 : x
  2. Step 2: Convert to fraction form
    486,056.40/681,178.80 = 486,056.40/x
  3. Step 3: Cross multiply
    486,056.40x = 681,178.80 × 486,056.40
  4. Step 4: Simplify right side
    486,056.40x = 331,091,315,284.32
  5. Step 5: Solve for x
    x = 331,091,315,284.32/486,056.40
  6. Step 6: Final answer
    x = 681,178.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.