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Finding the Fourth Proportional to 720,743.36, 994,653.84 and 478,608.40

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Solution

The fourth proportional to 720,743.36, 994,653.84 and 478,608.40 is: 660,498.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,743.36 : 994,653.84 = 478,608.40 : x
  2. Step 2: Convert to fraction form
    720,743.36/994,653.84 = 478,608.40/x
  3. Step 3: Cross multiply
    720,743.36x = 994,653.84 × 478,608.40
  4. Step 4: Simplify right side
    720,743.36x = 476,049,682,916.26
  5. Step 5: Solve for x
    x = 476,049,682,916.26/720,743.36
  6. Step 6: Final answer
    x = 660,498.19

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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.