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Finding the Fourth Proportional to 402,988.37, 556,112.79 and 219,220.83

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Solution

The fourth proportional to 402,988.37, 556,112.79 and 219,220.83 is: 302,518.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,988.37 : 556,112.79 = 219,220.83 : x
  2. Step 2: Convert to fraction form
    402,988.37/556,112.79 = 219,220.83/x
  3. Step 3: Cross multiply
    402,988.37x = 556,112.79 × 219,220.83
  4. Step 4: Simplify right side
    402,988.37x = 121,911,507,397.42
  5. Step 5: Solve for x
    x = 121,911,507,397.42/402,988.37
  6. Step 6: Final answer
    x = 302,518.68

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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.