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Finding the Fourth Proportional to 423,269.80, 634,904.70 and 406,940.20

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Solution

The fourth proportional to 423,269.80, 634,904.70 and 406,940.20 is: 610,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,269.80 : 634,904.70 = 406,940.20 : x
  2. Step 2: Convert to fraction form
    423,269.80/634,904.70 = 406,940.20/x
  3. Step 3: Cross multiply
    423,269.80x = 634,904.70 × 406,940.20
  4. Step 4: Simplify right side
    423,269.80x = 258,368,245,598.94
  5. Step 5: Solve for x
    x = 258,368,245,598.94/423,269.80
  6. Step 6: Final answer
    x = 610,410.30

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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.