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Finding the Fourth Proportional to 554,235.55, 764,780.06 and 312,503.72

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Solution

The fourth proportional to 554,235.55, 764,780.06 and 312,503.72 is: 431,218.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,235.55 : 764,780.06 = 312,503.72 : x
  2. Step 2: Convert to fraction form
    554,235.55/764,780.06 = 312,503.72/x
  3. Step 3: Cross multiply
    554,235.55x = 764,780.06 × 312,503.72
  4. Step 4: Simplify right side
    554,235.55x = 238,996,610,689.18
  5. Step 5: Solve for x
    x = 238,996,610,689.18/554,235.55
  6. Step 6: Final answer
    x = 431,218.48

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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.