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Finding the Fourth Proportional to 521,445, 719,594.10 and 282,981

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Solution

The fourth proportional to 521,445, 719,594.10 and 282,981 is: 390,513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,445 : 719,594.10 = 282,981 : x
  2. Step 2: Convert to fraction form
    521,445/719,594.10 = 282,981/x
  3. Step 3: Cross multiply
    521,445x = 719,594.10 × 282,981
  4. Step 4: Simplify right side
    521,445x = 203,631,458,012.10
  5. Step 5: Solve for x
    x = 203,631,458,012.10/521,445
  6. Step 6: Final answer
    x = 390,513.78

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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.