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Finding the Fourth Proportional to 292,509.12, 438,763.70 and 70,893.12

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Solution

The fourth proportional to 292,509.12, 438,763.70 and 70,893.12 is: 106,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,509.12 : 438,763.70 = 70,893.12 : x
  2. Step 2: Convert to fraction form
    292,509.12/438,763.70 = 70,893.12/x
  3. Step 3: Cross multiply
    292,509.12x = 438,763.70 × 70,893.12
  4. Step 4: Simplify right side
    292,509.12x = 31,105,327,635.74
  5. Step 5: Solve for x
    x = 31,105,327,635.74/292,509.12
  6. Step 6: Final answer
    x = 106,339.68

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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.