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Finding the Fourth Proportional to 880,955.12, 1,215,509.82 and 518,394.80

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Solution

The fourth proportional to 880,955.12, 1,215,509.82 and 518,394.80 is: 715,262.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,955.12 : 1,215,509.82 = 518,394.80 : x
  2. Step 2: Convert to fraction form
    880,955.12/1,215,509.82 = 518,394.80/x
  3. Step 3: Cross multiply
    880,955.12x = 1,215,509.82 × 518,394.80
  4. Step 4: Simplify right side
    880,955.12x = 630,113,970,036.94
  5. Step 5: Solve for x
    x = 630,113,970,036.94/880,955.12
  6. Step 6: Final answer
    x = 715,262.28

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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.