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Finding the Fourth Proportional to 521,900.61, 720,155.52 and 306,962.25

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Solution

The fourth proportional to 521,900.61, 720,155.52 and 306,962.25 is: 423,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,900.61 : 720,155.52 = 306,962.25 : x
  2. Step 2: Convert to fraction form
    521,900.61/720,155.52 = 306,962.25/x
  3. Step 3: Cross multiply
    521,900.61x = 720,155.52 × 306,962.25
  4. Step 4: Simplify right side
    521,900.61x = 221,060,558,769.12
  5. Step 5: Solve for x
    x = 221,060,558,769.12/521,900.61
  6. Step 6: Final answer
    x = 423,568.31

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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.