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Finding the Fourth Proportional to 315,291.36, 473,004.60 and 90,649.80

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Solution

The fourth proportional to 315,291.36, 473,004.60 and 90,649.80 is: 135,994.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,291.36 : 473,004.60 = 90,649.80 : x
  2. Step 2: Convert to fraction form
    315,291.36/473,004.60 = 90,649.80/x
  3. Step 3: Cross multiply
    315,291.36x = 473,004.60 × 90,649.80
  4. Step 4: Simplify right side
    315,291.36x = 42,877,772,389.08
  5. Step 5: Solve for x
    x = 42,877,772,389.08/315,291.36
  6. Step 6: Final answer
    x = 135,994.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.