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Finding the Fourth Proportional to 710,355.42, 980,304.93 and 388,086.39

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Solution

The fourth proportional to 710,355.42, 980,304.93 and 388,086.39 is: 535,567.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,355.42 : 980,304.93 = 388,086.39 : x
  2. Step 2: Convert to fraction form
    710,355.42/980,304.93 = 388,086.39/x
  3. Step 3: Cross multiply
    710,355.42x = 980,304.93 × 388,086.39
  4. Step 4: Simplify right side
    710,355.42x = 380,443,001,382.90
  5. Step 5: Solve for x
    x = 380,443,001,382.90/710,355.42
  6. Step 6: Final answer
    x = 535,567.11

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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.