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Finding the Fourth Proportional to 978,422.32, 1,349,649.48 and 615,270.16

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Solution

The fourth proportional to 978,422.32, 1,349,649.48 and 615,270.16 is: 848,712.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,422.32 : 1,349,649.48 = 615,270.16 : x
  2. Step 2: Convert to fraction form
    978,422.32/1,349,649.48 = 615,270.16/x
  3. Step 3: Cross multiply
    978,422.32x = 1,349,649.48 × 615,270.16
  4. Step 4: Simplify right side
    978,422.32x = 830,399,051,503.52
  5. Step 5: Solve for x
    x = 830,399,051,503.52/978,422.32
  6. Step 6: Final answer
    x = 848,712.29

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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.