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Finding the Fourth Proportional to 402,835.20, 604,690.20 and 253,244.40

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Solution

The fourth proportional to 402,835.20, 604,690.20 and 253,244.40 is: 380,141.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,835.20 : 604,690.20 = 253,244.40 : x
  2. Step 2: Convert to fraction form
    402,835.20/604,690.20 = 253,244.40/x
  3. Step 3: Cross multiply
    402,835.20x = 604,690.20 × 253,244.40
  4. Step 4: Simplify right side
    402,835.20x = 153,134,406,884.88
  5. Step 5: Solve for x
    x = 153,134,406,884.88/402,835.20
  6. Step 6: Final answer
    x = 380,141.57

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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.