Home / 712,844.82-983,725.83-390,567.12

Finding the Fourth Proportional to 712,844.82, 983,725.83 and 390,567.12

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Solution

The fourth proportional to 712,844.82, 983,725.83 and 390,567.12 is: 538,982.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,844.82 : 983,725.83 = 390,567.12 : x
  2. Step 2: Convert to fraction form
    712,844.82/983,725.83 = 390,567.12/x
  3. Step 3: Cross multiply
    712,844.82x = 983,725.83 × 390,567.12
  4. Step 4: Simplify right side
    712,844.82x = 384,210,964,292.71
  5. Step 5: Solve for x
    x = 384,210,964,292.71/712,844.82
  6. Step 6: Final answer
    x = 538,982.61

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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.