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Finding the Fourth Proportional to 518,443.50, 777,971.44 and 218,904.70

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Solution

The fourth proportional to 518,443.50, 777,971.44 and 218,904.70 is: 328,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,443.50 : 777,971.44 = 218,904.70 : x
  2. Step 2: Convert to fraction form
    518,443.50/777,971.44 = 218,904.70/x
  3. Step 3: Cross multiply
    518,443.50x = 777,971.44 × 218,904.70
  4. Step 4: Simplify right side
    518,443.50x = 170,301,604,681.77
  5. Step 5: Solve for x
    x = 170,301,604,681.77/518,443.50
  6. Step 6: Final answer
    x = 328,486.33

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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.