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Finding the Fourth Proportional to 438,307.70, 657,461.55 and 171,931.10

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Solution

The fourth proportional to 438,307.70, 657,461.55 and 171,931.10 is: 257,896.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,307.70 : 657,461.55 = 171,931.10 : x
  2. Step 2: Convert to fraction form
    438,307.70/657,461.55 = 171,931.10/x
  3. Step 3: Cross multiply
    438,307.70x = 657,461.55 × 171,931.10
  4. Step 4: Simplify right side
    438,307.70x = 113,038,087,499.21
  5. Step 5: Solve for x
    x = 113,038,087,499.21/438,307.70
  6. Step 6: Final answer
    x = 257,896.65

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Similar ratio
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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.