Home / 686,007.85-1,024,117.68-640,420.07

Finding the Fourth Proportional to 686,007.85, 1,024,117.68 and 640,420.07

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Solution

The fourth proportional to 686,007.85, 1,024,117.68 and 640,420.07 is: 956,061.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,007.85 : 1,024,117.68 = 640,420.07 : x
  2. Step 2: Convert to fraction form
    686,007.85/1,024,117.68 = 640,420.07/x
  3. Step 3: Cross multiply
    686,007.85x = 1,024,117.68 × 640,420.07
  4. Step 4: Simplify right side
    686,007.85x = 655,865,513,111.74
  5. Step 5: Solve for x
    x = 655,865,513,111.74/686,007.85
  6. Step 6: Final answer
    x = 956,061.24

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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.