Home / 684,875.20-1,027,312.80-643,403.20

Finding the Fourth Proportional to 684,875.20, 1,027,312.80 and 643,403.20

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Solution

The fourth proportional to 684,875.20, 1,027,312.80 and 643,403.20 is: 965,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,875.20 : 1,027,312.80 = 643,403.20 : x
  2. Step 2: Convert to fraction form
    684,875.20/1,027,312.80 = 643,403.20/x
  3. Step 3: Cross multiply
    684,875.20x = 1,027,312.80 × 643,403.20
  4. Step 4: Simplify right side
    684,875.20x = 660,976,342,920.96
  5. Step 5: Solve for x
    x = 660,976,342,920.96/684,875.20
  6. Step 6: Final answer
    x = 965,104.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.