Home / 712,723.66-983,559.81-390,426.68

Finding the Fourth Proportional to 712,723.66, 983,559.81 and 390,426.68

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Solution

The fourth proportional to 712,723.66, 983,559.81 and 390,426.68 is: 538,789.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,723.66 : 983,559.81 = 390,426.68 : x
  2. Step 2: Convert to fraction form
    712,723.66/983,559.81 = 390,426.68/x
  3. Step 3: Cross multiply
    712,723.66x = 983,559.81 × 390,426.68
  4. Step 4: Simplify right side
    712,723.66x = 384,007,995,122.73
  5. Step 5: Solve for x
    x = 384,007,995,122.73/712,723.66
  6. Step 6: Final answer
    x = 538,789.46

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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.