Home / 712,492.79-983,218.03-390,194.60

Finding the Fourth Proportional to 712,492.79, 983,218.03 and 390,194.60

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Solution

The fourth proportional to 712,492.79, 983,218.03 and 390,194.60 is: 538,456.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,492.79 : 983,218.03 = 390,194.60 : x
  2. Step 2: Convert to fraction form
    712,492.79/983,218.03 = 390,194.60/x
  3. Step 3: Cross multiply
    712,492.79x = 983,218.03 × 390,194.60
  4. Step 4: Simplify right side
    712,492.79x = 383,646,360,037.06
  5. Step 5: Solve for x
    x = 383,646,360,037.06/712,492.79
  6. Step 6: Final answer
    x = 538,456.48

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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.