Home / 513,964.63-709,279.59-281,387.69

Finding the Fourth Proportional to 513,964.63, 709,279.59 and 281,387.69

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Solution

The fourth proportional to 513,964.63, 709,279.59 and 281,387.69 is: 388,319.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,964.63 : 709,279.59 = 281,387.69 : x
  2. Step 2: Convert to fraction form
    513,964.63/709,279.59 = 281,387.69/x
  3. Step 3: Cross multiply
    513,964.63x = 709,279.59 × 281,387.69
  4. Step 4: Simplify right side
    513,964.63x = 199,582,543,980.05
  5. Step 5: Solve for x
    x = 199,582,543,980.05/513,964.63
  6. Step 6: Final answer
    x = 388,319.61

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Double scale
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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.