Home / 661,748.86-913,294.50-389,802.70

Finding the Fourth Proportional to 661,748.86, 913,294.50 and 389,802.70

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Solution

The fourth proportional to 661,748.86, 913,294.50 and 389,802.70 is: 537,975.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,748.86 : 913,294.50 = 389,802.70 : x
  2. Step 2: Convert to fraction form
    661,748.86/913,294.50 = 389,802.70/x
  3. Step 3: Cross multiply
    661,748.86x = 913,294.50 × 389,802.70
  4. Step 4: Simplify right side
    661,748.86x = 356,004,661,995.15
  5. Step 5: Solve for x
    x = 356,004,661,995.15/661,748.86
  6. Step 6: Final answer
    x = 537,975.48

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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.