Home / 728,916.32-1,005,906.16-406,618.40

Finding the Fourth Proportional to 728,916.32, 1,005,906.16 and 406,618.40

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Solution

The fourth proportional to 728,916.32, 1,005,906.16 and 406,618.40 is: 561,134.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,916.32 : 1,005,906.16 = 406,618.40 : x
  2. Step 2: Convert to fraction form
    728,916.32/1,005,906.16 = 406,618.40/x
  3. Step 3: Cross multiply
    728,916.32x = 1,005,906.16 × 406,618.40
  4. Step 4: Simplify right side
    728,916.32x = 409,019,953,329.34
  5. Step 5: Solve for x
    x = 409,019,953,329.34/728,916.32
  6. Step 6: Final answer
    x = 561,134.31

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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.