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Finding the Fourth Proportional to 634,409.89, 875,486.68 and 347,931.72

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Solution

The fourth proportional to 634,409.89, 875,486.68 and 347,931.72 is: 480,146.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,409.89 : 875,486.68 = 347,931.72 : x
  2. Step 2: Convert to fraction form
    634,409.89/875,486.68 = 347,931.72/x
  3. Step 3: Cross multiply
    634,409.89x = 875,486.68 × 347,931.72
  4. Step 4: Simplify right side
    634,409.89x = 304,609,585,539.66
  5. Step 5: Solve for x
    x = 304,609,585,539.66/634,409.89
  6. Step 6: Final answer
    x = 480,146.34

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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.