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Finding the Fourth Proportional to 518,985, 778,472.86 and 163,999.08

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Solution

The fourth proportional to 518,985, 778,472.86 and 163,999.08 is: 245,997.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,985 : 778,472.86 = 163,999.08 : x
  2. Step 2: Convert to fraction form
    518,985/778,472.86 = 163,999.08/x
  3. Step 3: Cross multiply
    518,985x = 778,472.86 × 163,999.08
  4. Step 4: Simplify right side
    518,985x = 127,668,832,844.97
  5. Step 5: Solve for x
    x = 127,668,832,844.97/518,985
  6. Step 6: Final answer
    x = 245,997.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.