Home / 678,123.20-1,018,351.20-442,510.40

Finding the Fourth Proportional to 678,123.20, 1,018,351.20 and 442,510.40

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Solution

The fourth proportional to 678,123.20, 1,018,351.20 and 442,510.40 is: 664,526.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,123.20 : 1,018,351.20 = 442,510.40 : x
  2. Step 2: Convert to fraction form
    678,123.20/1,018,351.20 = 442,510.40/x
  3. Step 3: Cross multiply
    678,123.20x = 1,018,351.20 × 442,510.40
  4. Step 4: Simplify right side
    678,123.20x = 450,630,996,852.48
  5. Step 5: Solve for x
    x = 450,630,996,852.48/678,123.20
  6. Step 6: Final answer
    x = 664,526.74

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Double scale
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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.