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Finding the Fourth Proportional to 978,008.20, 1,349,716.06 and 548,316.16

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Solution

The fourth proportional to 978,008.20, 1,349,716.06 and 548,316.16 is: 756,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,008.20 : 1,349,716.06 = 548,316.16 : x
  2. Step 2: Convert to fraction form
    978,008.20/1,349,716.06 = 548,316.16/x
  3. Step 3: Cross multiply
    978,008.20x = 1,349,716.06 × 548,316.16
  4. Step 4: Simplify right side
    978,008.20x = 740,071,127,109.53
  5. Step 5: Solve for x
    x = 740,071,127,109.53/978,008.20
  6. Step 6: Final answer
    x = 756,712.60

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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.