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Finding the Fourth Proportional to 219,218.10, 328,827.15 and 171,978.90

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Solution

The fourth proportional to 219,218.10, 328,827.15 and 171,978.90 is: 257,968.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,218.10 : 328,827.15 = 171,978.90 : x
  2. Step 2: Convert to fraction form
    219,218.10/328,827.15 = 171,978.90/x
  3. Step 3: Cross multiply
    219,218.10x = 328,827.15 × 171,978.90
  4. Step 4: Simplify right side
    219,218.10x = 56,551,331,547.14
  5. Step 5: Solve for x
    x = 56,551,331,547.14/219,218.10
  6. Step 6: Final answer
    x = 257,968.35

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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.