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Finding the Fourth Proportional to 710,454.93, 980,416.26 and 388,158.09

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Solution

The fourth proportional to 710,454.93, 980,416.26 and 388,158.09 is: 535,651.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,454.93 : 980,416.26 = 388,158.09 : x
  2. Step 2: Convert to fraction form
    710,454.93/980,416.26 = 388,158.09/x
  3. Step 3: Cross multiply
    710,454.93x = 980,416.26 × 388,158.09
  4. Step 4: Simplify right side
    710,454.93x = 380,556,502,886.54
  5. Step 5: Solve for x
    x = 380,556,502,886.54/710,454.93
  6. Step 6: Final answer
    x = 535,651.86

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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.