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Finding the Fourth Proportional to 265,358.81, 398,038.22 and 78,384.89

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Solution

The fourth proportional to 265,358.81, 398,038.22 and 78,384.89 is: 117,577.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,358.81 : 398,038.22 = 78,384.89 : x
  2. Step 2: Convert to fraction form
    265,358.81/398,038.22 = 78,384.89/x
  3. Step 3: Cross multiply
    265,358.81x = 398,038.22 × 78,384.89
  4. Step 4: Simplify right side
    265,358.81x = 31,200,182,987.61
  5. Step 5: Solve for x
    x = 31,200,182,987.61/265,358.81
  6. Step 6: Final answer
    x = 117,577.34

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Similar ratio
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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.