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Finding the Fourth Proportional to 708,901.88, 978,116.44 and 402,954.17

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Solution

The fourth proportional to 708,901.88, 978,116.44 and 402,954.17 is: 555,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,901.88 : 978,116.44 = 402,954.17 : x
  2. Step 2: Convert to fraction form
    708,901.88/978,116.44 = 402,954.17/x
  3. Step 3: Cross multiply
    708,901.88x = 978,116.44 × 402,954.17
  4. Step 4: Simplify right side
    708,901.88x = 394,136,099,681.46
  5. Step 5: Solve for x
    x = 394,136,099,681.46/708,901.88
  6. Step 6: Final answer
    x = 555,981.18

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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.