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Finding the Fourth Proportional to 708,800.51, 978,109.18 and 402,836.46

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Solution

The fourth proportional to 708,800.51, 978,109.18 and 402,836.46 is: 555,894.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,800.51 : 978,109.18 = 402,836.46 : x
  2. Step 2: Convert to fraction form
    708,800.51/978,109.18 = 402,836.46/x
  3. Step 3: Cross multiply
    708,800.51x = 978,109.18 × 402,836.46
  4. Step 4: Simplify right side
    708,800.51x = 394,018,039,564.70
  5. Step 5: Solve for x
    x = 394,018,039,564.70/708,800.51
  6. Step 6: Final answer
    x = 555,894.13

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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.