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Finding the Fourth Proportional to 404,899.80, 607,349.70 and 310,421.40

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Solution

The fourth proportional to 404,899.80, 607,349.70 and 310,421.40 is: 465,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,899.80 : 607,349.70 = 310,421.40 : x
  2. Step 2: Convert to fraction form
    404,899.80/607,349.70 = 310,421.40/x
  3. Step 3: Cross multiply
    404,899.80x = 607,349.70 × 310,421.40
  4. Step 4: Simplify right side
    404,899.80x = 188,534,344,163.58
  5. Step 5: Solve for x
    x = 188,534,344,163.58/404,899.80
  6. Step 6: Final answer
    x = 465,632.10

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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.