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Finding the Fourth Proportional to 641,142.40, 884,699.42 and 369,298.71

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Solution

The fourth proportional to 641,142.40, 884,699.42 and 369,298.71 is: 509,587.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,142.40 : 884,699.42 = 369,298.71 : x
  2. Step 2: Convert to fraction form
    641,142.40/884,699.42 = 369,298.71/x
  3. Step 3: Cross multiply
    641,142.40x = 884,699.42 × 369,298.71
  4. Step 4: Simplify right side
    641,142.40x = 326,718,354,543.75
  5. Step 5: Solve for x
    x = 326,718,354,543.75/641,142.40
  6. Step 6: Final answer
    x = 509,587.81

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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.