Home / 712,840.32-983,719.62-390,562.62

Finding the Fourth Proportional to 712,840.32, 983,719.62 and 390,562.62

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Solution

The fourth proportional to 712,840.32, 983,719.62 and 390,562.62 is: 538,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,840.32 : 983,719.62 = 390,562.62 : x
  2. Step 2: Convert to fraction form
    712,840.32/983,719.62 = 390,562.62/x
  3. Step 3: Cross multiply
    712,840.32x = 983,719.62 × 390,562.62
  4. Step 4: Simplify right side
    712,840.32x = 384,204,112,132.60
  5. Step 5: Solve for x
    x = 384,204,112,132.60/712,840.32
  6. Step 6: Final answer
    x = 538,976.40

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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.