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Finding the Fourth Proportional to 710,349.42, 980,296.65 and 388,080.39

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Solution

The fourth proportional to 710,349.42, 980,296.65 and 388,080.39 is: 535,558.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,349.42 : 980,296.65 = 388,080.39 : x
  2. Step 2: Convert to fraction form
    710,349.42/980,296.65 = 388,080.39/x
  3. Step 3: Cross multiply
    710,349.42x = 980,296.65 × 388,080.39
  4. Step 4: Simplify right side
    710,349.42x = 380,433,906,247.69
  5. Step 5: Solve for x
    x = 380,433,906,247.69/710,349.42
  6. Step 6: Final answer
    x = 535,558.83

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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.