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Finding the Fourth Proportional to 328,430.29, 453,061.71 and 285,312.97

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Solution

The fourth proportional to 328,430.29, 453,061.71 and 285,312.97 is: 393,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,430.29 : 453,061.71 = 285,312.97 : x
  2. Step 2: Convert to fraction form
    328,430.29/453,061.71 = 285,312.97/x
  3. Step 3: Cross multiply
    328,430.29x = 453,061.71 × 285,312.97
  4. Step 4: Simplify right side
    328,430.29x = 129,264,382,073.38
  5. Step 5: Solve for x
    x = 129,264,382,073.38/328,430.29
  6. Step 6: Final answer
    x = 393,582.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.