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Finding the Fourth Proportional to 911,528, 1,257,934.56 and 509,145.92

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Solution

The fourth proportional to 911,528, 1,257,934.56 and 509,145.92 is: 702,635.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,528 : 1,257,934.56 = 509,145.92 : x
  2. Step 2: Convert to fraction form
    911,528/1,257,934.56 = 509,145.92/x
  3. Step 3: Cross multiply
    911,528x = 1,257,934.56 × 509,145.92
  4. Step 4: Simplify right side
    911,528x = 640,472,248,851.00
  5. Step 5: Solve for x
    x = 640,472,248,851.00/911,528
  6. Step 6: Final answer
    x = 702,635.85

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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.