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Finding the Fourth Proportional to 404,239.80, 606,359.70 and 315,010.20

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Solution

The fourth proportional to 404,239.80, 606,359.70 and 315,010.20 is: 472,515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,239.80 : 606,359.70 = 315,010.20 : x
  2. Step 2: Convert to fraction form
    404,239.80/606,359.70 = 315,010.20/x
  3. Step 3: Cross multiply
    404,239.80x = 606,359.70 × 315,010.20
  4. Step 4: Simplify right side
    404,239.80x = 191,009,490,368.94
  5. Step 5: Solve for x
    x = 191,009,490,368.94/404,239.80
  6. Step 6: Final answer
    x = 472,515.30

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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.