Home / 712,625.29-983,423.33-390,340.78

Finding the Fourth Proportional to 712,625.29, 983,423.33 and 390,340.78

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Solution

The fourth proportional to 712,625.29, 983,423.33 and 390,340.78 is: 538,670.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,625.29 : 983,423.33 = 390,340.78 : x
  2. Step 2: Convert to fraction form
    712,625.29/983,423.33 = 390,340.78/x
  3. Step 3: Cross multiply
    712,625.29x = 983,423.33 × 390,340.78
  4. Step 4: Simplify right side
    712,625.29x = 383,870,229,702.40
  5. Step 5: Solve for x
    x = 383,870,229,702.40/712,625.29
  6. Step 6: Final answer
    x = 538,670.51

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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.