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Finding the Fourth Proportional to 978.68, 1,465.14 and 592.76

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Solution

The fourth proportional to 978.68, 1,465.14 and 592.76 is: 887.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.68 : 1,465.14 = 592.76 : x
  2. Step 2: Convert to fraction form
    978.68/1,465.14 = 592.76/x
  3. Step 3: Cross multiply
    978.68x = 1,465.14 × 592.76
  4. Step 4: Simplify right side
    978.68x = 868,476.39
  5. Step 5: Solve for x
    x = 868,476.39/978.68
  6. Step 6: Final answer
    x = 887.40

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