Home / 661,430.40-912,844.80-374,919.36

Finding the Fourth Proportional to 661,430.40, 912,844.80 and 374,919.36

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Solution

The fourth proportional to 661,430.40, 912,844.80 and 374,919.36 is: 517,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,430.40 : 912,844.80 = 374,919.36 : x
  2. Step 2: Convert to fraction form
    661,430.40/912,844.80 = 374,919.36/x
  3. Step 3: Cross multiply
    661,430.40x = 912,844.80 × 374,919.36
  4. Step 4: Simplify right side
    661,430.40x = 342,243,188,195.33
  5. Step 5: Solve for x
    x = 342,243,188,195.33/661,430.40
  6. Step 6: Final answer
    x = 517,428.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.