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Finding the Fourth Proportional to 708,754.99, 978,046.45 and 402,790.95

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Solution

The fourth proportional to 708,754.99, 978,046.45 and 402,790.95 is: 555,831.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,754.99 : 978,046.45 = 402,790.95 : x
  2. Step 2: Convert to fraction form
    708,754.99/978,046.45 = 402,790.95/x
  3. Step 3: Cross multiply
    708,754.99x = 978,046.45 × 402,790.95
  4. Step 4: Simplify right side
    708,754.99x = 393,948,260,483.41
  5. Step 5: Solve for x
    x = 393,948,260,483.41/708,754.99
  6. Step 6: Final answer
    x = 555,831.38

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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.