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Finding the Fourth Proportional to 646,859.40, 970,289.10 and 292,043.40

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Solution

The fourth proportional to 646,859.40, 970,289.10 and 292,043.40 is: 438,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,859.40 : 970,289.10 = 292,043.40 : x
  2. Step 2: Convert to fraction form
    646,859.40/970,289.10 = 292,043.40/x
  3. Step 3: Cross multiply
    646,859.40x = 970,289.10 × 292,043.40
  4. Step 4: Simplify right side
    646,859.40x = 283,366,527,746.94
  5. Step 5: Solve for x
    x = 283,366,527,746.94/646,859.40
  6. Step 6: Final answer
    x = 438,065.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.