Home / 712,845.84-983,727.20-390,568.12

Finding the Fourth Proportional to 712,845.84, 983,727.20 and 390,568.12

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Solution

The fourth proportional to 712,845.84, 983,727.20 and 390,568.12 is: 538,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,845.84 : 983,727.20 = 390,568.12 : x
  2. Step 2: Convert to fraction form
    712,845.84/983,727.20 = 390,568.12/x
  3. Step 3: Cross multiply
    712,845.84x = 983,727.20 × 390,568.12
  4. Step 4: Simplify right side
    712,845.84x = 384,212,483,096.86
  5. Step 5: Solve for x
    x = 384,212,483,096.86/712,845.84
  6. Step 6: Final answer
    x = 538,983.97

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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.