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Finding the Fourth Proportional to 328,031.40, 492,047.10 and 286,559.40

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Solution

The fourth proportional to 328,031.40, 492,047.10 and 286,559.40 is: 429,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,031.40 : 492,047.10 = 286,559.40 : x
  2. Step 2: Convert to fraction form
    328,031.40/492,047.10 = 286,559.40/x
  3. Step 3: Cross multiply
    328,031.40x = 492,047.10 × 286,559.40
  4. Step 4: Simplify right side
    328,031.40x = 141,000,721,747.74
  5. Step 5: Solve for x
    x = 141,000,721,747.74/328,031.40
  6. Step 6: Final answer
    x = 429,839.10

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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.