Home / 926,920.80-1,390,381.20-643,485.60

Finding the Fourth Proportional to 926,920.80, 1,390,381.20 and 643,485.60

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Solution

The fourth proportional to 926,920.80, 1,390,381.20 and 643,485.60 is: 965,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,920.80 : 1,390,381.20 = 643,485.60 : x
  2. Step 2: Convert to fraction form
    926,920.80/1,390,381.20 = 643,485.60/x
  3. Step 3: Cross multiply
    926,920.80x = 1,390,381.20 × 643,485.60
  4. Step 4: Simplify right side
    926,920.80x = 894,690,280,710.72
  5. Step 5: Solve for x
    x = 894,690,280,710.72/926,920.80
  6. Step 6: Final answer
    x = 965,228.40

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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.