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Finding the Fourth Proportional to 298,841.90, 448,130.94 and 85,561.40

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Solution

The fourth proportional to 298,841.90, 448,130.94 and 85,561.40 is: 128,304.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,841.90 : 448,130.94 = 85,561.40 : x
  2. Step 2: Convert to fraction form
    298,841.90/448,130.94 = 85,561.40/x
  3. Step 3: Cross multiply
    298,841.90x = 448,130.94 × 85,561.40
  4. Step 4: Simplify right side
    298,841.90x = 38,342,711,409.19
  5. Step 5: Solve for x
    x = 38,342,711,409.19/298,841.90
  6. Step 6: Final answer
    x = 128,304.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.