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Finding the Fourth Proportional to 710,302.05, 980,238.38 and 388,032.91

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Solution

The fourth proportional to 710,302.05, 980,238.38 and 388,032.91 is: 535,497.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,302.05 : 980,238.38 = 388,032.91 : x
  2. Step 2: Convert to fraction form
    710,302.05/980,238.38 = 388,032.91/x
  3. Step 3: Cross multiply
    710,302.05x = 980,238.38 × 388,032.91
  4. Step 4: Simplify right side
    710,302.05x = 380,364,744,243.73
  5. Step 5: Solve for x
    x = 380,364,744,243.73/710,302.05
  6. Step 6: Final answer
    x = 535,497.18

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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.