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Finding the Fourth Proportional to 315,078.80, 472,925.40 and 157,485.20

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Solution

The fourth proportional to 315,078.80, 472,925.40 and 157,485.20 is: 236,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,078.80 : 472,925.40 = 157,485.20 : x
  2. Step 2: Convert to fraction form
    315,078.80/472,925.40 = 157,485.20/x
  3. Step 3: Cross multiply
    315,078.80x = 472,925.40 × 157,485.20
  4. Step 4: Simplify right side
    315,078.80x = 74,478,751,204.08
  5. Step 5: Solve for x
    x = 74,478,751,204.08/315,078.80
  6. Step 6: Final answer
    x = 236,381.35

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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.