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Finding the Fourth Proportional to 521,362.42, 719,420.67 and 291,887.80

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Solution

The fourth proportional to 521,362.42, 719,420.67 and 291,887.80 is: 402,771.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,362.42 : 719,420.67 = 291,887.80 : x
  2. Step 2: Convert to fraction form
    521,362.42/719,420.67 = 291,887.80/x
  3. Step 3: Cross multiply
    521,362.42x = 719,420.67 × 291,887.80
  4. Step 4: Simplify right side
    521,362.42x = 209,990,116,640.83
  5. Step 5: Solve for x
    x = 209,990,116,640.83/521,362.42
  6. Step 6: Final answer
    x = 402,771.87

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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.