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Finding the Fourth Proportional to 265,756.64, 398,686.32 and 85,890.48

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Solution

The fourth proportional to 265,756.64, 398,686.32 and 85,890.48 is: 128,852.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,756.64 : 398,686.32 = 85,890.48 : x
  2. Step 2: Convert to fraction form
    265,756.64/398,686.32 = 85,890.48/x
  3. Step 3: Cross multiply
    265,756.64x = 398,686.32 × 85,890.48
  4. Step 4: Simplify right side
    265,756.64x = 34,243,359,394.23
  5. Step 5: Solve for x
    x = 34,243,359,394.23/265,756.64
  6. Step 6: Final answer
    x = 128,852.32

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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.