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Finding the Fourth Proportional to 710,245.25, 980,132.64 and 387,955.43

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Solution

The fourth proportional to 710,245.25, 980,132.64 and 387,955.43 is: 535,375.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,245.25 : 980,132.64 = 387,955.43 : x
  2. Step 2: Convert to fraction form
    710,245.25/980,132.64 = 387,955.43/x
  3. Step 3: Cross multiply
    710,245.25x = 980,132.64 × 387,955.43
  4. Step 4: Simplify right side
    710,245.25x = 380,247,779,808.24
  5. Step 5: Solve for x
    x = 380,247,779,808.24/710,245.25
  6. Step 6: Final answer
    x = 535,375.32

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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.