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Finding the Fourth Proportional to 438,920.10, 657,985.95 and 172,862.10

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Solution

The fourth proportional to 438,920.10, 657,985.95 and 172,862.10 is: 259,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,920.10 : 657,985.95 = 172,862.10 : x
  2. Step 2: Convert to fraction form
    438,920.10/657,985.95 = 172,862.10/x
  3. Step 3: Cross multiply
    438,920.10x = 657,985.95 × 172,862.10
  4. Step 4: Simplify right side
    438,920.10x = 113,740,833,087.50
  5. Step 5: Solve for x
    x = 113,740,833,087.50/438,920.10
  6. Step 6: Final answer
    x = 259,137.90

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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.