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Finding the Fourth Proportional to 515,416.32, 773,346.96 and 278,925.84

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Solution

The fourth proportional to 515,416.32, 773,346.96 and 278,925.84 is: 418,509.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,416.32 : 773,346.96 = 278,925.84 : x
  2. Step 2: Convert to fraction form
    515,416.32/773,346.96 = 278,925.84/x
  3. Step 3: Cross multiply
    515,416.32x = 773,346.96 × 278,925.84
  4. Step 4: Simplify right side
    515,416.32x = 215,706,450,429.45
  5. Step 5: Solve for x
    x = 215,706,450,429.45/515,416.32
  6. Step 6: Final answer
    x = 418,509.16

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1.5x scale

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.