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Finding the Fourth Proportional to 402,200.60, 555,041.36 and 220,916.74

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Solution

The fourth proportional to 402,200.60, 555,041.36 and 220,916.74 is: 304,867.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,200.60 : 555,041.36 = 220,916.74 : x
  2. Step 2: Convert to fraction form
    402,200.60/555,041.36 = 220,916.74/x
  3. Step 3: Cross multiply
    402,200.60x = 555,041.36 × 220,916.74
  4. Step 4: Simplify right side
    402,200.60x = 122,617,927,816.37
  5. Step 5: Solve for x
    x = 122,617,927,816.37/402,200.60
  6. Step 6: Final answer
    x = 304,867.59

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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.