Home / 645,176.72-890,065.32-403,037.84

Finding the Fourth Proportional to 645,176.72, 890,065.32 and 403,037.84

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Solution

The fourth proportional to 645,176.72, 890,065.32 and 403,037.84 is: 556,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,176.72 : 890,065.32 = 403,037.84 : x
  2. Step 2: Convert to fraction form
    645,176.72/890,065.32 = 403,037.84/x
  3. Step 3: Cross multiply
    645,176.72x = 890,065.32 × 403,037.84
  4. Step 4: Simplify right side
    645,176.72x = 358,730,004,031.71
  5. Step 5: Solve for x
    x = 358,730,004,031.71/645,176.72
  6. Step 6: Final answer
    x = 556,018.21

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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.