Home / 678,753.60-1,018,130.40-346,286.40

Finding the Fourth Proportional to 678,753.60, 1,018,130.40 and 346,286.40

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Solution

The fourth proportional to 678,753.60, 1,018,130.40 and 346,286.40 is: 519,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,753.60 : 1,018,130.40 = 346,286.40 : x
  2. Step 2: Convert to fraction form
    678,753.60/1,018,130.40 = 346,286.40/x
  3. Step 3: Cross multiply
    678,753.60x = 1,018,130.40 × 346,286.40
  4. Step 4: Simplify right side
    678,753.60x = 352,564,710,946.56
  5. Step 5: Solve for x
    x = 352,564,710,946.56/678,753.60
  6. Step 6: Final answer
    x = 519,429.60

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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.