Home / 712,422.61-983,133.25-390,132.62

Finding the Fourth Proportional to 712,422.61, 983,133.25 and 390,132.62

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Solution

The fourth proportional to 712,422.61, 983,133.25 and 390,132.62 is: 538,377.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,422.61 : 983,133.25 = 390,132.62 : x
  2. Step 2: Convert to fraction form
    712,422.61/983,133.25 = 390,132.62/x
  3. Step 3: Cross multiply
    712,422.61x = 983,133.25 × 390,132.62
  4. Step 4: Simplify right side
    712,422.61x = 383,552,348,427.37
  5. Step 5: Solve for x
    x = 383,552,348,427.37/712,422.61
  6. Step 6: Final answer
    x = 538,377.56

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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.