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Finding the Fourth Proportional to 661,302.96, 912,804.30 and 389,349.24

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Solution

The fourth proportional to 661,302.96, 912,804.30 and 389,349.24 is: 537,423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,302.96 : 912,804.30 = 389,349.24 : x
  2. Step 2: Convert to fraction form
    661,302.96/912,804.30 = 389,349.24/x
  3. Step 3: Cross multiply
    661,302.96x = 912,804.30 × 389,349.24
  4. Step 4: Simplify right side
    661,302.96x = 355,399,660,473.73
  5. Step 5: Solve for x
    x = 355,399,660,473.73/661,302.96
  6. Step 6: Final answer
    x = 537,423.36

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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.