Home / 712,724.66-983,561.19-390,427.68

Finding the Fourth Proportional to 712,724.66, 983,561.19 and 390,427.68

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Solution

The fourth proportional to 712,724.66, 983,561.19 and 390,427.68 is: 538,790.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,724.66 : 983,561.19 = 390,427.68 : x
  2. Step 2: Convert to fraction form
    712,724.66/983,561.19 = 390,427.68/x
  3. Step 3: Cross multiply
    712,724.66x = 983,561.19 × 390,427.68
  4. Step 4: Simplify right side
    712,724.66x = 384,009,513,549.74
  5. Step 5: Solve for x
    x = 384,009,513,549.74/712,724.66
  6. Step 6: Final answer
    x = 538,790.83

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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.