Home / 438,415.20-657,795.60-172,130.40

Finding the Fourth Proportional to 438,415.20, 657,795.60 and 172,130.40

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Solution

The fourth proportional to 438,415.20, 657,795.60 and 172,130.40 is: 258,263.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,415.20 : 657,795.60 = 172,130.40 : x
  2. Step 2: Convert to fraction form
    438,415.20/657,795.60 = 172,130.40/x
  3. Step 3: Cross multiply
    438,415.20x = 657,795.60 × 172,130.40
  4. Step 4: Simplify right side
    438,415.20x = 113,226,619,746.24
  5. Step 5: Solve for x
    x = 113,226,619,746.24/438,415.20
  6. Step 6: Final answer
    x = 258,263.44

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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.