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Finding the Fourth Proportional to 402,679.60, 604,408.20 and 245,215.60

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Solution

The fourth proportional to 402,679.60, 604,408.20 and 245,215.60 is: 368,060.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,679.60 : 604,408.20 = 245,215.60 : x
  2. Step 2: Convert to fraction form
    402,679.60/604,408.20 = 245,215.60/x
  3. Step 3: Cross multiply
    402,679.60x = 604,408.20 × 245,215.60
  4. Step 4: Simplify right side
    402,679.60x = 148,210,319,407.92
  5. Step 5: Solve for x
    x = 148,210,319,407.92/402,679.60
  6. Step 6: Final answer
    x = 368,060.16

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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.