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Finding the Fourth Proportional to 707,721.20, 976,645.32 and 401,795.12

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Solution

The fourth proportional to 707,721.20, 976,645.32 and 401,795.12 is: 554,471.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,721.20 : 976,645.32 = 401,795.12 : x
  2. Step 2: Convert to fraction form
    707,721.20/976,645.32 = 401,795.12/x
  3. Step 3: Cross multiply
    707,721.20x = 976,645.32 × 401,795.12
  4. Step 4: Simplify right side
    707,721.20x = 392,411,323,546.84
  5. Step 5: Solve for x
    x = 392,411,323,546.84/707,721.20
  6. Step 6: Final answer
    x = 554,471.62

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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.