Home / 686,008.22-1,024,118.24-640,420.45

Finding the Fourth Proportional to 686,008.22, 1,024,118.24 and 640,420.45

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Solution

The fourth proportional to 686,008.22, 1,024,118.24 and 640,420.45 is: 956,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,008.22 : 1,024,118.24 = 640,420.45 : x
  2. Step 2: Convert to fraction form
    686,008.22/1,024,118.24 = 640,420.45/x
  3. Step 3: Cross multiply
    686,008.22x = 1,024,118.24 × 640,420.45
  4. Step 4: Simplify right side
    686,008.22x = 655,866,264,114.01
  5. Step 5: Solve for x
    x = 655,866,264,114.01/686,008.22
  6. Step 6: Final answer
    x = 956,061.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.