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Finding the Fourth Proportional to 307,528.61, 424,436.21 and 186,646.55

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Solution

The fourth proportional to 307,528.61, 424,436.21 and 186,646.55 is: 257,600.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,528.61 : 424,436.21 = 186,646.55 : x
  2. Step 2: Convert to fraction form
    307,528.61/424,436.21 = 186,646.55/x
  3. Step 3: Cross multiply
    307,528.61x = 424,436.21 × 186,646.55
  4. Step 4: Simplify right side
    307,528.61x = 79,219,551,236.16
  5. Step 5: Solve for x
    x = 79,219,551,236.16/307,528.61
  6. Step 6: Final answer
    x = 257,600.59

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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.