Home / 645,443.46-890,699.30-358,957.38

Finding the Fourth Proportional to 645,443.46, 890,699.30 and 358,957.38

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Solution

The fourth proportional to 645,443.46, 890,699.30 and 358,957.38 is: 495,354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,443.46 : 890,699.30 = 358,957.38 : x
  2. Step 2: Convert to fraction form
    645,443.46/890,699.30 = 358,957.38/x
  3. Step 3: Cross multiply
    645,443.46x = 890,699.30 × 358,957.38
  4. Step 4: Simplify right side
    645,443.46x = 319,723,087,095.83
  5. Step 5: Solve for x
    x = 319,723,087,095.83/645,443.46
  6. Step 6: Final answer
    x = 495,354.14

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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.