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Finding the Fourth Proportional to 572,287.20, 857,696.40 and 319,567.20

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Solution

The fourth proportional to 572,287.20, 857,696.40 and 319,567.20 is: 478,940.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,287.20 : 857,696.40 = 319,567.20 : x
  2. Step 2: Convert to fraction form
    572,287.20/857,696.40 = 319,567.20/x
  3. Step 3: Cross multiply
    572,287.20x = 857,696.40 × 319,567.20
  4. Step 4: Simplify right side
    572,287.20x = 274,091,636,998.08
  5. Step 5: Solve for x
    x = 274,091,636,998.08/572,287.20
  6. Step 6: Final answer
    x = 478,940.71

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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.