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Finding the Fourth Proportional to 521,543.92, 719,842.90 and 317,662.06

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Solution

The fourth proportional to 521,543.92, 719,842.90 and 317,662.06 is: 438,442.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,543.92 : 719,842.90 = 317,662.06 : x
  2. Step 2: Convert to fraction form
    521,543.92/719,842.90 = 317,662.06/x
  3. Step 3: Cross multiply
    521,543.92x = 719,842.90 × 317,662.06
  4. Step 4: Simplify right side
    521,543.92x = 228,666,778,490.37
  5. Step 5: Solve for x
    x = 228,666,778,490.37/521,543.92
  6. Step 6: Final answer
    x = 438,442.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.