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Finding the Fourth Proportional to 527,998.53, 728,639.55 and 286,281.17

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Solution

The fourth proportional to 527,998.53, 728,639.55 and 286,281.17 is: 395,068.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,998.53 : 728,639.55 = 286,281.17 : x
  2. Step 2: Convert to fraction form
    527,998.53/728,639.55 = 286,281.17/x
  3. Step 3: Cross multiply
    527,998.53x = 728,639.55 × 286,281.17
  4. Step 4: Simplify right side
    527,998.53x = 208,595,781,971.47
  5. Step 5: Solve for x
    x = 208,595,781,971.47/527,998.53
  6. Step 6: Final answer
    x = 395,068.87

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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.