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Finding the Fourth Proportional to 710,709.83, 980,779.66 and 388,419.84

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Solution

The fourth proportional to 710,709.83, 980,779.66 and 388,419.84 is: 536,019.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,709.83 : 980,779.66 = 388,419.84 : x
  2. Step 2: Convert to fraction form
    710,709.83/980,779.66 = 388,419.84/x
  3. Step 3: Cross multiply
    710,709.83x = 980,779.66 × 388,419.84
  4. Step 4: Simplify right side
    710,709.83x = 380,954,277,641.41
  5. Step 5: Solve for x
    x = 380,954,277,641.41/710,709.83
  6. Step 6: Final answer
    x = 536,019.43

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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.