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Finding the Fourth Proportional to 292,925.80, 438,416.70 and 212,735.80

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Solution

The fourth proportional to 292,925.80, 438,416.70 and 212,735.80 is: 318,397.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,925.80 : 438,416.70 = 212,735.80 : x
  2. Step 2: Convert to fraction form
    292,925.80/438,416.70 = 212,735.80/x
  3. Step 3: Cross multiply
    292,925.80x = 438,416.70 × 212,735.80
  4. Step 4: Simplify right side
    292,925.80x = 93,266,927,407.86
  5. Step 5: Solve for x
    x = 93,266,927,407.86/292,925.80
  6. Step 6: Final answer
    x = 318,397.79

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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.