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Finding the Fourth Proportional to 265,297.32, 398,018.76 and 78,308.76

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Solution

The fourth proportional to 265,297.32, 398,018.76 and 78,308.76 is: 117,484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,297.32 : 398,018.76 = 78,308.76 : x
  2. Step 2: Convert to fraction form
    265,297.32/398,018.76 = 78,308.76/x
  3. Step 3: Cross multiply
    265,297.32x = 398,018.76 × 78,308.76
  4. Step 4: Simplify right side
    265,297.32x = 31,168,355,552.34
  5. Step 5: Solve for x
    x = 31,168,355,552.34/265,297.32
  6. Step 6: Final answer
    x = 117,484.62

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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.