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Finding the Fourth Proportional to 710,693.44, 980,729.04 and 388,407.40

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Solution

The fourth proportional to 710,693.44, 980,729.04 and 388,407.40 is: 535,986.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,693.44 : 980,729.04 = 388,407.40 : x
  2. Step 2: Convert to fraction form
    710,693.44/980,729.04 = 388,407.40/x
  3. Step 3: Cross multiply
    710,693.44x = 980,729.04 × 388,407.40
  4. Step 4: Simplify right side
    710,693.44x = 380,922,416,530.90
  5. Step 5: Solve for x
    x = 380,922,416,530.90/710,693.44
  6. Step 6: Final answer
    x = 535,986.96

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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.