Home / 645,401.07-890,548.70-358,913.79

Finding the Fourth Proportional to 645,401.07, 890,548.70 and 358,913.79

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Solution

The fourth proportional to 645,401.07, 890,548.70 and 358,913.79 is: 495,242.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,401.07 : 890,548.70 = 358,913.79 : x
  2. Step 2: Convert to fraction form
    645,401.07/890,548.70 = 358,913.79/x
  3. Step 3: Cross multiply
    645,401.07x = 890,548.70 × 358,913.79
  4. Step 4: Simplify right side
    645,401.07x = 319,630,207,302.00
  5. Step 5: Solve for x
    x = 319,630,207,302.00/645,401.07
  6. Step 6: Final answer
    x = 495,242.76

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Double scale
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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.