Home / 661,378.87-912,897.08-431,971.23

Finding the Fourth Proportional to 661,378.87, 912,897.08 and 431,971.23

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Solution

The fourth proportional to 661,378.87, 912,897.08 and 431,971.23 is: 596,247.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,378.87 : 912,897.08 = 431,971.23 : x
  2. Step 2: Convert to fraction form
    661,378.87/912,897.08 = 431,971.23/x
  3. Step 3: Cross multiply
    661,378.87x = 912,897.08 × 431,971.23
  4. Step 4: Simplify right side
    661,378.87x = 394,345,274,689.20
  5. Step 5: Solve for x
    x = 394,345,274,689.20/661,378.87
  6. Step 6: Final answer
    x = 596,247.16

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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.