Home / 645,312.86-890,495.17-358,826.79

Finding the Fourth Proportional to 645,312.86, 890,495.17 and 358,826.79

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Solution

The fourth proportional to 645,312.86, 890,495.17 and 358,826.79 is: 495,160.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,312.86 : 890,495.17 = 358,826.79 : x
  2. Step 2: Convert to fraction form
    645,312.86/890,495.17 = 358,826.79/x
  3. Step 3: Cross multiply
    645,312.86x = 890,495.17 × 358,826.79
  4. Step 4: Simplify right side
    645,312.86x = 319,533,525,803.89
  5. Step 5: Solve for x
    x = 319,533,525,803.89/645,312.86
  6. Step 6: Final answer
    x = 495,160.64

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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.