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Finding the Fourth Proportional to 978,054.18, 1,348,474.48 and 698,984.88

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Solution

The fourth proportional to 978,054.18, 1,348,474.48 and 698,984.88 is: 963,712.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,054.18 : 1,348,474.48 = 698,984.88 : x
  2. Step 2: Convert to fraction form
    978,054.18/1,348,474.48 = 698,984.88/x
  3. Step 3: Cross multiply
    978,054.18x = 1,348,474.48 × 698,984.88
  4. Step 4: Simplify right side
    978,054.18x = 942,563,272,585.86
  5. Step 5: Solve for x
    x = 942,563,272,585.86/978,054.18
  6. Step 6: Final answer
    x = 963,712.74

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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.