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Finding the Fourth Proportional to 521,311.52, 719,242.60 and 291,835.01

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Solution

The fourth proportional to 521,311.52, 719,242.60 and 291,835.01 is: 402,638.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,311.52 : 719,242.60 = 291,835.01 : x
  2. Step 2: Convert to fraction form
    521,311.52/719,242.60 = 291,835.01/x
  3. Step 3: Cross multiply
    521,311.52x = 719,242.60 × 291,835.01
  4. Step 4: Simplify right side
    521,311.52x = 209,900,166,308.04
  5. Step 5: Solve for x
    x = 209,900,166,308.04/521,311.52
  6. Step 6: Final answer
    x = 402,638.65

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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.