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Finding the Fourth Proportional to 661,228.86, 912,595.59 and 403,255.47

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Solution

The fourth proportional to 661,228.86, 912,595.59 and 403,255.47 is: 556,553.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,228.86 : 912,595.59 = 403,255.47 : x
  2. Step 2: Convert to fraction form
    661,228.86/912,595.59 = 403,255.47/x
  3. Step 3: Cross multiply
    661,228.86x = 912,595.59 × 403,255.47
  4. Step 4: Simplify right side
    661,228.86x = 368,009,163,565.38
  5. Step 5: Solve for x
    x = 368,009,163,565.38/661,228.86
  6. Step 6: Final answer
    x = 556,553.39

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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.