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Finding the Fourth Proportional to 287,421, 431,316.03 and 192,758.10

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Solution

The fourth proportional to 287,421, 431,316.03 and 192,758.10 is: 289,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,421 : 431,316.03 = 192,758.10 : x
  2. Step 2: Convert to fraction form
    287,421/431,316.03 = 192,758.10/x
  3. Step 3: Cross multiply
    287,421x = 431,316.03 × 192,758.10
  4. Step 4: Simplify right side
    287,421x = 83,139,658,442.34
  5. Step 5: Solve for x
    x = 83,139,658,442.34/287,421
  6. Step 6: Final answer
    x = 289,260.90

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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.