Home / 712,709.76-983,539.71-390,431.46

Finding the Fourth Proportional to 712,709.76, 983,539.71 and 390,431.46

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Solution

The fourth proportional to 712,709.76, 983,539.71 and 390,431.46 is: 538,795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,709.76 : 983,539.71 = 390,431.46 : x
  2. Step 2: Convert to fraction form
    712,709.76/983,539.71 = 390,431.46/x
  3. Step 3: Cross multiply
    712,709.76x = 983,539.71 × 390,431.46
  4. Step 4: Simplify right side
    712,709.76x = 384,004,844,943.28
  5. Step 5: Solve for x
    x = 384,004,844,943.28/712,709.76
  6. Step 6: Final answer
    x = 538,795.55

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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.