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Finding the Fourth Proportional to 402,321.86, 555,064.58 and 257,212.59

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Solution

The fourth proportional to 402,321.86, 555,064.58 and 257,212.59 is: 354,864.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,321.86 : 555,064.58 = 257,212.59 : x
  2. Step 2: Convert to fraction form
    402,321.86/555,064.58 = 257,212.59/x
  3. Step 3: Cross multiply
    402,321.86x = 555,064.58 × 257,212.59
  4. Step 4: Simplify right side
    402,321.86x = 142,769,598,239.06
  5. Step 5: Solve for x
    x = 142,769,598,239.06/402,321.86
  6. Step 6: Final answer
    x = 354,864.13

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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.