Home / 670,719.96-1,006,079.76-390,040.38

Finding the Fourth Proportional to 670,719.96, 1,006,079.76 and 390,040.38

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Solution

The fourth proportional to 670,719.96, 1,006,079.76 and 390,040.38 is: 585,060.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,719.96 : 1,006,079.76 = 390,040.38 : x
  2. Step 2: Convert to fraction form
    670,719.96/1,006,079.76 = 390,040.38/x
  3. Step 3: Cross multiply
    670,719.96x = 1,006,079.76 × 390,040.38
  4. Step 4: Simplify right side
    670,719.96x = 392,411,731,900.71
  5. Step 5: Solve for x
    x = 392,411,731,900.71/670,719.96
  6. Step 6: Final answer
    x = 585,060.47

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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.