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Finding the Fourth Proportional to 423,266.80, 634,900.20 and 406,937.20

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Solution

The fourth proportional to 423,266.80, 634,900.20 and 406,937.20 is: 610,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,266.80 : 634,900.20 = 406,937.20 : x
  2. Step 2: Convert to fraction form
    423,266.80/634,900.20 = 406,937.20/x
  3. Step 3: Cross multiply
    423,266.80x = 634,900.20 × 406,937.20
  4. Step 4: Simplify right side
    423,266.80x = 258,364,509,667.44
  5. Step 5: Solve for x
    x = 258,364,509,667.44/423,266.80
  6. Step 6: Final answer
    x = 610,405.80

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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.