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Finding the Fourth Proportional to 451,378.16, 623,063.64 and 308,035.76

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Solution

The fourth proportional to 451,378.16, 623,063.64 and 308,035.76 is: 425,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,378.16 : 623,063.64 = 308,035.76 : x
  2. Step 2: Convert to fraction form
    451,378.16/623,063.64 = 308,035.76/x
  3. Step 3: Cross multiply
    451,378.16x = 623,063.64 × 308,035.76
  4. Step 4: Simplify right side
    451,378.16x = 191,925,881,875.77
  5. Step 5: Solve for x
    x = 191,925,881,875.77/451,378.16
  6. Step 6: Final answer
    x = 425,199.75

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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.