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Finding the Fourth Proportional to 710,388.63, 980,339.76 and 388,104.01

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Solution

The fourth proportional to 710,388.63, 980,339.76 and 388,104.01 is: 535,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,388.63 : 980,339.76 = 388,104.01 : x
  2. Step 2: Convert to fraction form
    710,388.63/980,339.76 = 388,104.01/x
  3. Step 3: Cross multiply
    710,388.63x = 980,339.76 × 388,104.01
  4. Step 4: Simplify right side
    710,388.63x = 380,473,789,567.59
  5. Step 5: Solve for x
    x = 380,473,789,567.59/710,388.63
  6. Step 6: Final answer
    x = 535,585.42

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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.