Home / 645,335.92-890,564.32-358,849.84

Finding the Fourth Proportional to 645,335.92, 890,564.32 and 358,849.84

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Solution

The fourth proportional to 645,335.92, 890,564.32 and 358,849.84 is: 495,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,335.92 : 890,564.32 = 358,849.84 : x
  2. Step 2: Convert to fraction form
    645,335.92/890,564.32 = 358,849.84/x
  3. Step 3: Cross multiply
    645,335.92x = 890,564.32 × 358,849.84
  4. Step 4: Simplify right side
    645,335.92x = 319,578,863,741.71
  5. Step 5: Solve for x
    x = 319,578,863,741.71/645,335.92
  6. Step 6: Final answer
    x = 495,213.20

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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.