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Finding the Fourth Proportional to 521,900.64, 720,155.52 and 306,962.28

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Solution

The fourth proportional to 521,900.64, 720,155.52 and 306,962.28 is: 423,568.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,900.64 : 720,155.52 = 306,962.28 : x
  2. Step 2: Convert to fraction form
    521,900.64/720,155.52 = 306,962.28/x
  3. Step 3: Cross multiply
    521,900.64x = 720,155.52 × 306,962.28
  4. Step 4: Simplify right side
    521,900.64x = 221,060,580,373.79
  5. Step 5: Solve for x
    x = 221,060,580,373.79/521,900.64
  6. Step 6: Final answer
    x = 423,568.33

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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.