Home / 1,109,142.80-1,663,708.80-434,747.60

Finding the Fourth Proportional to 1,109,142.80, 1,663,708.80 and 434,747.60

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Solution

The fourth proportional to 1,109,142.80, 1,663,708.80 and 434,747.60 is: 652,119.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109,142.80 : 1,663,708.80 = 434,747.60 : x
  2. Step 2: Convert to fraction form
    1,109,142.80/1,663,708.80 = 434,747.60/x
  3. Step 3: Cross multiply
    1,109,142.80x = 1,663,708.80 × 434,747.60
  4. Step 4: Simplify right side
    1,109,142.80x = 723,293,407,898.88
  5. Step 5: Solve for x
    x = 723,293,407,898.88/1,109,142.80
  6. Step 6: Final answer
    x = 652,119.28

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Double scale
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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.