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Finding the Fourth Proportional to 286,640.79, 394,660.80 and 260,068.74

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Solution

The fourth proportional to 286,640.79, 394,660.80 and 260,068.74 is: 358,075.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,640.79 : 394,660.80 = 260,068.74 : x
  2. Step 2: Convert to fraction form
    286,640.79/394,660.80 = 260,068.74/x
  3. Step 3: Cross multiply
    286,640.79x = 394,660.80 × 260,068.74
  4. Step 4: Simplify right side
    286,640.79x = 102,638,936,983.39
  5. Step 5: Solve for x
    x = 102,638,936,983.39/286,640.79
  6. Step 6: Final answer
    x = 358,075.13

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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.