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Finding the Fourth Proportional to 553,639.70, 829,803.45 and 287,263.10

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Solution

The fourth proportional to 553,639.70, 829,803.45 and 287,263.10 is: 430,554.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,639.70 : 829,803.45 = 287,263.10 : x
  2. Step 2: Convert to fraction form
    553,639.70/829,803.45 = 287,263.10/x
  3. Step 3: Cross multiply
    553,639.70x = 829,803.45 × 287,263.10
  4. Step 4: Simplify right side
    553,639.70x = 238,371,911,437.70
  5. Step 5: Solve for x
    x = 238,371,911,437.70/553,639.70
  6. Step 6: Final answer
    x = 430,554.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.