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Finding the Fourth Proportional to 406,880.80, 610,321.20 and 126,426.40

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Solution

The fourth proportional to 406,880.80, 610,321.20 and 126,426.40 is: 189,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,880.80 : 610,321.20 = 126,426.40 : x
  2. Step 2: Convert to fraction form
    406,880.80/610,321.20 = 126,426.40/x
  3. Step 3: Cross multiply
    406,880.80x = 610,321.20 × 126,426.40
  4. Step 4: Simplify right side
    406,880.80x = 77,160,712,159.68
  5. Step 5: Solve for x
    x = 77,160,712,159.68/406,880.80
  6. Step 6: Final answer
    x = 189,639.60

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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.