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Finding the Fourth Proportional to 438,742.30, 657,129.30 and 360,010.30

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Solution

The fourth proportional to 438,742.30, 657,129.30 and 360,010.30 is: 539,207.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,742.30 : 657,129.30 = 360,010.30 : x
  2. Step 2: Convert to fraction form
    438,742.30/657,129.30 = 360,010.30/x
  3. Step 3: Cross multiply
    438,742.30x = 657,129.30 × 360,010.30
  4. Step 4: Simplify right side
    438,742.30x = 236,573,316,431.79
  5. Step 5: Solve for x
    x = 236,573,316,431.79/438,742.30
  6. Step 6: Final answer
    x = 539,207.91

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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.