Home / 712,418.73-983,108.32-390,123.28

Finding the Fourth Proportional to 712,418.73, 983,108.32 and 390,123.28

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Solution

The fourth proportional to 712,418.73, 983,108.32 and 390,123.28 is: 538,353.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,418.73 : 983,108.32 = 390,123.28 : x
  2. Step 2: Convert to fraction form
    712,418.73/983,108.32 = 390,123.28/x
  3. Step 3: Cross multiply
    712,418.73x = 983,108.32 × 390,123.28
  4. Step 4: Simplify right side
    712,418.73x = 383,533,442,393.69
  5. Step 5: Solve for x
    x = 383,533,442,393.69/712,418.73
  6. Step 6: Final answer
    x = 538,353.96

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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.