Home / 918,820.80-1,378,382.40-287,582.40

Finding the Fourth Proportional to 918,820.80, 1,378,382.40 and 287,582.40

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Solution

The fourth proportional to 918,820.80, 1,378,382.40 and 287,582.40 is: 431,420.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,820.80 : 1,378,382.40 = 287,582.40 : x
  2. Step 2: Convert to fraction form
    918,820.80/1,378,382.40 = 287,582.40/x
  3. Step 3: Cross multiply
    918,820.80x = 1,378,382.40 × 287,582.40
  4. Step 4: Simplify right side
    918,820.80x = 396,398,518,709.76
  5. Step 5: Solve for x
    x = 396,398,518,709.76/918,820.80
  6. Step 6: Final answer
    x = 431,420.92

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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.