Home / 712,408.69-983,123.31-390,125.08

Finding the Fourth Proportional to 712,408.69, 983,123.31 and 390,125.08

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Solution

The fourth proportional to 712,408.69, 983,123.31 and 390,125.08 is: 538,372.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,408.69 : 983,123.31 = 390,125.08 : x
  2. Step 2: Convert to fraction form
    712,408.69/983,123.31 = 390,125.08/x
  3. Step 3: Cross multiply
    712,408.69x = 983,123.31 × 390,125.08
  4. Step 4: Simplify right side
    712,408.69x = 383,541,059,963.62
  5. Step 5: Solve for x
    x = 383,541,059,963.62/712,408.69
  6. Step 6: Final answer
    x = 538,372.24

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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.