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Finding the Fourth Proportional to 265,785.80, 398,678.70 and 133,075.40

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Solution

The fourth proportional to 265,785.80, 398,678.70 and 133,075.40 is: 199,613.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,785.80 : 398,678.70 = 133,075.40 : x
  2. Step 2: Convert to fraction form
    265,785.80/398,678.70 = 133,075.40/x
  3. Step 3: Cross multiply
    265,785.80x = 398,678.70 × 133,075.40
  4. Step 4: Simplify right side
    265,785.80x = 53,054,327,473.98
  5. Step 5: Solve for x
    x = 53,054,327,473.98/265,785.80
  6. Step 6: Final answer
    x = 199,613.10

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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.