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Finding the Fourth Proportional to 912,776.80, 1,367,998.80 and 438,440.80

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Solution

The fourth proportional to 912,776.80, 1,367,998.80 and 438,440.80 is: 657,100.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,776.80 : 1,367,998.80 = 438,440.80 : x
  2. Step 2: Convert to fraction form
    912,776.80/1,367,998.80 = 438,440.80/x
  3. Step 3: Cross multiply
    912,776.80x = 1,367,998.80 × 438,440.80
  4. Step 4: Simplify right side
    912,776.80x = 599,786,488,271.04
  5. Step 5: Solve for x
    x = 599,786,488,271.04/912,776.80
  6. Step 6: Final answer
    x = 657,100.93

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1.5x scale

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.