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Finding the Fourth Proportional to 630,005.43, 869,376 and 358,037.40

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Solution

The fourth proportional to 630,005.43, 869,376 and 358,037.40 is: 494,073.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,005.43 : 869,376 = 358,037.40 : x
  2. Step 2: Convert to fraction form
    630,005.43/869,376 = 358,037.40/x
  3. Step 3: Cross multiply
    630,005.43x = 869,376 × 358,037.40
  4. Step 4: Simplify right side
    630,005.43x = 311,269,122,662.40
  5. Step 5: Solve for x
    x = 311,269,122,662.40/630,005.43
  6. Step 6: Final answer
    x = 494,073.71

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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.