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Finding the Fourth Proportional to 438,420.10, 657,630.15 and 438,420.10

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Solution

The fourth proportional to 438,420.10, 657,630.15 and 438,420.10 is: 657,630.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,420.10 : 657,630.15 = 438,420.10 : x
  2. Step 2: Convert to fraction form
    438,420.10/657,630.15 = 438,420.10/x
  3. Step 3: Cross multiply
    438,420.10x = 657,630.15 × 438,420.10
  4. Step 4: Simplify right side
    438,420.10x = 288,318,276,126.02
  5. Step 5: Solve for x
    x = 288,318,276,126.02/438,420.10
  6. Step 6: Final answer
    x = 657,630.15

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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.