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Finding the Fourth Proportional to 438,015.60, 657,023.40 and 157,561.20

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Solution

The fourth proportional to 438,015.60, 657,023.40 and 157,561.20 is: 236,341.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,015.60 : 657,023.40 = 157,561.20 : x
  2. Step 2: Convert to fraction form
    438,015.60/657,023.40 = 157,561.20/x
  3. Step 3: Cross multiply
    438,015.60x = 657,023.40 × 157,561.20
  4. Step 4: Simplify right side
    438,015.60x = 103,521,395,332.08
  5. Step 5: Solve for x
    x = 103,521,395,332.08/438,015.60
  6. Step 6: Final answer
    x = 236,341.80

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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.