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Finding the Fourth Proportional to 613,929.80, 921,019.71 and 258,945.14

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Solution

The fourth proportional to 613,929.80, 921,019.71 and 258,945.14 is: 388,470.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,929.80 : 921,019.71 = 258,945.14 : x
  2. Step 2: Convert to fraction form
    613,929.80/921,019.71 = 258,945.14/x
  3. Step 3: Cross multiply
    613,929.80x = 921,019.71 × 258,945.14
  4. Step 4: Simplify right side
    613,929.80x = 238,493,577,748.71
  5. Step 5: Solve for x
    x = 238,493,577,748.71/613,929.80
  6. Step 6: Final answer
    x = 388,470.44

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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.