Home / 688,985.78-1,033,411.86-209,217.74

Finding the Fourth Proportional to 688,985.78, 1,033,411.86 and 209,217.74

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Solution

The fourth proportional to 688,985.78, 1,033,411.86 and 209,217.74 is: 313,806.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,985.78 : 1,033,411.86 = 209,217.74 : x
  2. Step 2: Convert to fraction form
    688,985.78/1,033,411.86 = 209,217.74/x
  3. Step 3: Cross multiply
    688,985.78x = 1,033,411.86 × 209,217.74
  4. Step 4: Simplify right side
    688,985.78x = 216,208,093,838.40
  5. Step 5: Solve for x
    x = 216,208,093,838.40/688,985.78
  6. Step 6: Final answer
    x = 313,806.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.