Home / 686,637.81-947,527.17-380,726.63

Finding the Fourth Proportional to 686,637.81, 947,527.17 and 380,726.63

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Solution

The fourth proportional to 686,637.81, 947,527.17 and 380,726.63 is: 525,384.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,637.81 : 947,527.17 = 380,726.63 : x
  2. Step 2: Convert to fraction form
    686,637.81/947,527.17 = 380,726.63/x
  3. Step 3: Cross multiply
    686,637.81x = 947,527.17 × 380,726.63
  4. Step 4: Simplify right side
    686,637.81x = 360,748,823,655.40
  5. Step 5: Solve for x
    x = 360,748,823,655.40/686,637.81
  6. Step 6: Final answer
    x = 525,384.44

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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.