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Finding the Fourth Proportional to 315,528.60, 435,430.04 and 172,285.60

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Solution

The fourth proportional to 315,528.60, 435,430.04 and 172,285.60 is: 237,754.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,528.60 : 435,430.04 = 172,285.60 : x
  2. Step 2: Convert to fraction form
    315,528.60/435,430.04 = 172,285.60/x
  3. Step 3: Cross multiply
    315,528.60x = 435,430.04 × 172,285.60
  4. Step 4: Simplify right side
    315,528.60x = 75,018,325,699.42
  5. Step 5: Solve for x
    x = 75,018,325,699.42/315,528.60
  6. Step 6: Final answer
    x = 237,754.44

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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.