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Finding the Fourth Proportional to 660,986.40, 912,158.76 and 374,561.28

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Solution

The fourth proportional to 660,986.40, 912,158.76 and 374,561.28 is: 516,893.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,986.40 : 912,158.76 = 374,561.28 : x
  2. Step 2: Convert to fraction form
    660,986.40/912,158.76 = 374,561.28/x
  3. Step 3: Cross multiply
    660,986.40x = 912,158.76 × 374,561.28
  4. Step 4: Simplify right side
    660,986.40x = 341,659,352,708.81
  5. Step 5: Solve for x
    x = 341,659,352,708.81/660,986.40
  6. Step 6: Final answer
    x = 516,893.17

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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.