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Finding the Fourth Proportional to 636,421.24, 878,258.14 and 374,928.32

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Solution

The fourth proportional to 636,421.24, 878,258.14 and 374,928.32 is: 517,399.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,421.24 : 878,258.14 = 374,928.32 : x
  2. Step 2: Convert to fraction form
    636,421.24/878,258.14 = 374,928.32/x
  3. Step 3: Cross multiply
    636,421.24x = 878,258.14 × 374,928.32
  4. Step 4: Simplify right side
    636,421.24x = 329,283,848,956.53
  5. Step 5: Solve for x
    x = 329,283,848,956.53/636,421.24
  6. Step 6: Final answer
    x = 517,399.21

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1.5x scale

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.