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Finding the Fourth Proportional to 710,486.34, 980,442 and 388,207.50

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Solution

The fourth proportional to 710,486.34, 980,442 and 388,207.50 is: 535,710.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,486.34 : 980,442 = 388,207.50 : x
  2. Step 2: Convert to fraction form
    710,486.34/980,442 = 388,207.50/x
  3. Step 3: Cross multiply
    710,486.34x = 980,442 × 388,207.50
  4. Step 4: Simplify right side
    710,486.34x = 380,614,937,715
  5. Step 5: Solve for x
    x = 380,614,937,715/710,486.34
  6. Step 6: Final answer
    x = 535,710.42

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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.