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Finding the Fourth Proportional to 745,661.84, 1,028,661.54 and 504,028.76

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Solution

The fourth proportional to 745,661.84, 1,028,661.54 and 504,028.76 is: 695,321.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,661.84 : 1,028,661.54 = 504,028.76 : x
  2. Step 2: Convert to fraction form
    745,661.84/1,028,661.54 = 504,028.76/x
  3. Step 3: Cross multiply
    745,661.84x = 1,028,661.54 × 504,028.76
  4. Step 4: Simplify right side
    745,661.84x = 518,475,000,465.89
  5. Step 5: Solve for x
    x = 518,475,000,465.89/745,661.84
  6. Step 6: Final answer
    x = 695,321.89

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Half scale
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Double scale
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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.