Home / 712,736.89-983,578.10-390,439.96

Finding the Fourth Proportional to 712,736.89, 983,578.10 and 390,439.96

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Solution

The fourth proportional to 712,736.89, 983,578.10 and 390,439.96 is: 538,807.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,736.89 : 983,578.10 = 390,439.96 : x
  2. Step 2: Convert to fraction form
    712,736.89/983,578.10 = 390,439.96/x
  3. Step 3: Cross multiply
    712,736.89x = 983,578.10 × 390,439.96
  4. Step 4: Simplify right side
    712,736.89x = 384,028,187,150.79
  5. Step 5: Solve for x
    x = 384,028,187,150.79/712,736.89
  6. Step 6: Final answer
    x = 538,807.79

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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.