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Finding the Fourth Proportional to 438,699.60, 657,646.20 and 438,430.80

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Solution

The fourth proportional to 438,699.60, 657,646.20 and 438,430.80 is: 657,243.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,699.60 : 657,646.20 = 438,430.80 : x
  2. Step 2: Convert to fraction form
    438,699.60/657,646.20 = 438,430.80/x
  3. Step 3: Cross multiply
    438,699.60x = 657,646.20 × 438,430.80
  4. Step 4: Simplify right side
    438,699.60x = 288,332,349,582.96
  5. Step 5: Solve for x
    x = 288,332,349,582.96/438,699.60
  6. Step 6: Final answer
    x = 657,243.25

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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.