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Finding the Fourth Proportional to 710,715.47, 980,787.42 and 388,425.47

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Solution

The fourth proportional to 710,715.47, 980,787.42 and 388,425.47 is: 536,027.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,715.47 : 980,787.42 = 388,425.47 : x
  2. Step 2: Convert to fraction form
    710,715.47/980,787.42 = 388,425.47/x
  3. Step 3: Cross multiply
    710,715.47x = 980,787.42 × 388,425.47
  4. Step 4: Simplify right side
    710,715.47x = 380,962,809,679.65
  5. Step 5: Solve for x
    x = 380,962,809,679.65/710,715.47
  6. Step 6: Final answer
    x = 536,027.18

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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.