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Finding the Fourth Proportional to 777,476.75, 1,072,551.08 and 454,987.20

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Solution

The fourth proportional to 777,476.75, 1,072,551.08 and 454,987.20 is: 627,667.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,476.75 : 1,072,551.08 = 454,987.20 : x
  2. Step 2: Convert to fraction form
    777,476.75/1,072,551.08 = 454,987.20/x
  3. Step 3: Cross multiply
    777,476.75x = 1,072,551.08 × 454,987.20
  4. Step 4: Simplify right side
    777,476.75x = 487,997,012,746.18
  5. Step 5: Solve for x
    x = 487,997,012,746.18/777,476.75
  6. Step 6: Final answer
    x = 627,667.66

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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.