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Finding the Fourth Proportional to 418,984.37, 578,211.45 and 237,703.94

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Solution

The fourth proportional to 418,984.37, 578,211.45 and 237,703.94 is: 328,038.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,984.37 : 578,211.45 = 237,703.94 : x
  2. Step 2: Convert to fraction form
    418,984.37/578,211.45 = 237,703.94/x
  3. Step 3: Cross multiply
    418,984.37x = 578,211.45 × 237,703.94
  4. Step 4: Simplify right side
    418,984.37x = 137,443,139,818.11
  5. Step 5: Solve for x
    x = 137,443,139,818.11/418,984.37
  6. Step 6: Final answer
    x = 328,038.82

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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.