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Finding the Fourth Proportional to 438,355.80, 657,485.10 and 359,332.20

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Solution

The fourth proportional to 438,355.80, 657,485.10 and 359,332.20 is: 538,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,355.80 : 657,485.10 = 359,332.20 : x
  2. Step 2: Convert to fraction form
    438,355.80/657,485.10 = 359,332.20/x
  3. Step 3: Cross multiply
    438,355.80x = 657,485.10 × 359,332.20
  4. Step 4: Simplify right side
    438,355.80x = 236,255,567,450.22
  5. Step 5: Solve for x
    x = 236,255,567,450.22/438,355.80
  6. Step 6: Final answer
    x = 538,958.46

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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.