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Finding the Fourth Proportional to 710,350.81, 980,284.78 and 388,066.29

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Solution

The fourth proportional to 710,350.81, 980,284.78 and 388,066.29 is: 535,531.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,350.81 : 980,284.78 = 388,066.29 : x
  2. Step 2: Convert to fraction form
    710,350.81/980,284.78 = 388,066.29/x
  3. Step 3: Cross multiply
    710,350.81x = 980,284.78 × 388,066.29
  4. Step 4: Simplify right side
    710,350.81x = 380,415,475,777.74
  5. Step 5: Solve for x
    x = 380,415,475,777.74/710,350.81
  6. Step 6: Final answer
    x = 535,531.84

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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.