Home / 712,976.77-983,890.96-390,671.29

Finding the Fourth Proportional to 712,976.77, 983,890.96 and 390,671.29

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Solution

The fourth proportional to 712,976.77, 983,890.96 and 390,671.29 is: 539,117.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,976.77 : 983,890.96 = 390,671.29 : x
  2. Step 2: Convert to fraction form
    712,976.77/983,890.96 = 390,671.29/x
  3. Step 3: Cross multiply
    712,976.77x = 983,890.96 × 390,671.29
  4. Step 4: Simplify right side
    712,976.77x = 384,377,950,562.54
  5. Step 5: Solve for x
    x = 384,377,950,562.54/712,976.77
  6. Step 6: Final answer
    x = 539,117.07

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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.