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Finding the Fourth Proportional to 978,222.88, 1,349,374.20 and 615,071.20

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Solution

The fourth proportional to 978,222.88, 1,349,374.20 and 615,071.20 is: 848,437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,222.88 : 1,349,374.20 = 615,071.20 : x
  2. Step 2: Convert to fraction form
    978,222.88/1,349,374.20 = 615,071.20/x
  3. Step 3: Cross multiply
    978,222.88x = 1,349,374.20 × 615,071.20
  4. Step 4: Simplify right side
    978,222.88x = 829,961,208,443.04
  5. Step 5: Solve for x
    x = 829,961,208,443.04/978,222.88
  6. Step 6: Final answer
    x = 848,437.74

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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.