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Finding the Fourth Proportional to 402,437.60, 555,360.64 and 218,674.56

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Solution

The fourth proportional to 402,437.60, 555,360.64 and 218,674.56 is: 301,769.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,437.60 : 555,360.64 = 218,674.56 : x
  2. Step 2: Convert to fraction form
    402,437.60/555,360.64 = 218,674.56/x
  3. Step 3: Cross multiply
    402,437.60x = 555,360.64 × 218,674.56
  4. Step 4: Simplify right side
    402,437.60x = 121,443,243,593.32
  5. Step 5: Solve for x
    x = 121,443,243,593.32/402,437.60
  6. Step 6: Final answer
    x = 301,769.13

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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.