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Finding the Fourth Proportional to 528,697.71, 729,603.54 and 286,980.12

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Solution

The fourth proportional to 528,697.71, 729,603.54 and 286,980.12 is: 396,032.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,697.71 : 729,603.54 = 286,980.12 : x
  2. Step 2: Convert to fraction form
    528,697.71/729,603.54 = 286,980.12/x
  3. Step 3: Cross multiply
    528,697.71x = 729,603.54 × 286,980.12
  4. Step 4: Simplify right side
    528,697.71x = 209,381,711,461.63
  5. Step 5: Solve for x
    x = 209,381,711,461.63/528,697.71
  6. Step 6: Final answer
    x = 396,032.95

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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.