Home / 645,203.36-890,401.20-358,735.52

Finding the Fourth Proportional to 645,203.36, 890,401.20 and 358,735.52

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Solution

The fourth proportional to 645,203.36, 890,401.20 and 358,735.52 is: 495,066.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,203.36 : 890,401.20 = 358,735.52 : x
  2. Step 2: Convert to fraction form
    645,203.36/890,401.20 = 358,735.52/x
  3. Step 3: Cross multiply
    645,203.36x = 890,401.20 × 358,735.52
  4. Step 4: Simplify right side
    645,203.36x = 319,418,537,490.62
  5. Step 5: Solve for x
    x = 319,418,537,490.62/645,203.36
  6. Step 6: Final answer
    x = 495,066.45

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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.