Home / 712,731.72-983,580.94-390,420.55

Finding the Fourth Proportional to 712,731.72, 983,580.94 and 390,420.55

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Solution

The fourth proportional to 712,731.72, 983,580.94 and 390,420.55 is: 538,786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,731.72 : 983,580.94 = 390,420.55 : x
  2. Step 2: Convert to fraction form
    712,731.72/983,580.94 = 390,420.55/x
  3. Step 3: Cross multiply
    712,731.72x = 983,580.94 × 390,420.55
  4. Step 4: Simplify right side
    712,731.72x = 384,010,205,553.06
  5. Step 5: Solve for x
    x = 384,010,205,553.06/712,731.72
  6. Step 6: Final answer
    x = 538,786.46

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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.