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Finding the Fourth Proportional to 290,368.48, 400,707.12 and 163,055.20

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Solution

The fourth proportional to 290,368.48, 400,707.12 and 163,055.20 is: 225,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,368.48 : 400,707.12 = 163,055.20 : x
  2. Step 2: Convert to fraction form
    290,368.48/400,707.12 = 163,055.20/x
  3. Step 3: Cross multiply
    290,368.48x = 400,707.12 × 163,055.20
  4. Step 4: Simplify right side
    290,368.48x = 65,337,379,593.02
  5. Step 5: Solve for x
    x = 65,337,379,593.02/290,368.48
  6. Step 6: Final answer
    x = 225,015.40

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1.5x scale

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.