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Finding the Fourth Proportional to 661,485.20, 912,898.50 and 375,031.40

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Solution

The fourth proportional to 661,485.20, 912,898.50 and 375,031.40 is: 517,571.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,485.20 : 912,898.50 = 375,031.40 : x
  2. Step 2: Convert to fraction form
    661,485.20/912,898.50 = 375,031.40/x
  3. Step 3: Cross multiply
    661,485.20x = 912,898.50 × 375,031.40
  4. Step 4: Simplify right side
    661,485.20x = 342,365,602,512.90
  5. Step 5: Solve for x
    x = 342,365,602,512.90/661,485.20
  6. Step 6: Final answer
    x = 517,571.07

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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.