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Finding the Fourth Proportional to 710,275.18, 980,163.42 and 387,986.71

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Solution

The fourth proportional to 710,275.18, 980,163.42 and 387,986.71 is: 535,412.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,275.18 : 980,163.42 = 387,986.71 : x
  2. Step 2: Convert to fraction form
    710,275.18/980,163.42 = 387,986.71/x
  3. Step 3: Cross multiply
    710,275.18x = 980,163.42 × 387,986.71
  4. Step 4: Simplify right side
    710,275.18x = 380,290,380,588.15
  5. Step 5: Solve for x
    x = 380,290,380,588.15/710,275.18
  6. Step 6: Final answer
    x = 535,412.74

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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.