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Finding the Fourth Proportional to 715,571.04, 987,446.28 and 393,281.40

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Solution

The fourth proportional to 715,571.04, 987,446.28 and 393,281.40 is: 542,705.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,571.04 : 987,446.28 = 393,281.40 : x
  2. Step 2: Convert to fraction form
    715,571.04/987,446.28 = 393,281.40/x
  3. Step 3: Cross multiply
    715,571.04x = 987,446.28 × 393,281.40
  4. Step 4: Simplify right side
    715,571.04x = 388,344,255,423.19
  5. Step 5: Solve for x
    x = 388,344,255,423.19/715,571.04
  6. Step 6: Final answer
    x = 542,705.38

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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.