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Finding the Fourth Proportional to 438,415.40, 657,623.10 and 349,841.90

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Solution

The fourth proportional to 438,415.40, 657,623.10 and 349,841.90 is: 524,762.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,415.40 : 657,623.10 = 349,841.90 : x
  2. Step 2: Convert to fraction form
    438,415.40/657,623.10 = 349,841.90/x
  3. Step 3: Cross multiply
    438,415.40x = 657,623.10 × 349,841.90
  4. Step 4: Simplify right side
    438,415.40x = 230,064,114,787.89
  5. Step 5: Solve for x
    x = 230,064,114,787.89/438,415.40
  6. Step 6: Final answer
    x = 524,762.85

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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.