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Finding the Fourth Proportional to 612,289.80, 918,303.48 and 191,511

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Solution

The fourth proportional to 612,289.80, 918,303.48 and 191,511 is: 287,225.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,289.80 : 918,303.48 = 191,511 : x
  2. Step 2: Convert to fraction form
    612,289.80/918,303.48 = 191,511/x
  3. Step 3: Cross multiply
    612,289.80x = 918,303.48 × 191,511
  4. Step 4: Simplify right side
    612,289.80x = 175,865,217,758.28
  5. Step 5: Solve for x
    x = 175,865,217,758.28/612,289.80
  6. Step 6: Final answer
    x = 287,225.46

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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.