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Finding the Fourth Proportional to 438,381.04, 657,604.50 and 138,885.16

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Solution

The fourth proportional to 438,381.04, 657,604.50 and 138,885.16 is: 208,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,381.04 : 657,604.50 = 138,885.16 : x
  2. Step 2: Convert to fraction form
    438,381.04/657,604.50 = 138,885.16/x
  3. Step 3: Cross multiply
    438,381.04x = 657,604.50 × 138,885.16
  4. Step 4: Simplify right side
    438,381.04x = 91,331,506,199.22
  5. Step 5: Solve for x
    x = 91,331,506,199.22/438,381.04
  6. Step 6: Final answer
    x = 208,338.18

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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.