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Finding the Fourth Proportional to 664,984.80, 917,666.64 and 374,597.28

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Solution

The fourth proportional to 664,984.80, 917,666.64 and 374,597.28 is: 516,937.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,984.80 : 917,666.64 = 374,597.28 : x
  2. Step 2: Convert to fraction form
    664,984.80/917,666.64 = 374,597.28/x
  3. Step 3: Cross multiply
    664,984.80x = 917,666.64 × 374,597.28
  4. Step 4: Simplify right side
    664,984.80x = 343,755,427,290.74
  5. Step 5: Solve for x
    x = 343,755,427,290.74/664,984.80
  6. Step 6: Final answer
    x = 516,937.27

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.