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Finding the Fourth Proportional to 292,143.60, 438,085.80 and 134,420.40

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Solution

The fourth proportional to 292,143.60, 438,085.80 and 134,420.40 is: 201,570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,143.60 : 438,085.80 = 134,420.40 : x
  2. Step 2: Convert to fraction form
    292,143.60/438,085.80 = 134,420.40/x
  3. Step 3: Cross multiply
    292,143.60x = 438,085.80 × 134,420.40
  4. Step 4: Simplify right side
    292,143.60x = 58,887,668,470.32
  5. Step 5: Solve for x
    x = 58,887,668,470.32/292,143.60
  6. Step 6: Final answer
    x = 201,570.97

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1.5x scale

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.