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Finding the Fourth Proportional to 292,280.90, 438,421.35 and 212,576.90

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Solution

The fourth proportional to 292,280.90, 438,421.35 and 212,576.90 is: 318,865.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,280.90 : 438,421.35 = 212,576.90 : x
  2. Step 2: Convert to fraction form
    292,280.90/438,421.35 = 212,576.90/x
  3. Step 3: Cross multiply
    292,280.90x = 438,421.35 × 212,576.90
  4. Step 4: Simplify right side
    292,280.90x = 93,198,251,476.82
  5. Step 5: Solve for x
    x = 93,198,251,476.82/292,280.90
  6. Step 6: Final answer
    x = 318,865.35

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1.5x scale

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.