Home / 521,740.10-783,560.55-456,421.70

Finding the Fourth Proportional to 521,740.10, 783,560.55 and 456,421.70

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Solution

The fourth proportional to 521,740.10, 783,560.55 and 456,421.70 is: 685,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,740.10 : 783,560.55 = 456,421.70 : x
  2. Step 2: Convert to fraction form
    521,740.10/783,560.55 = 456,421.70/x
  3. Step 3: Cross multiply
    521,740.10x = 783,560.55 × 456,421.70
  4. Step 4: Simplify right side
    521,740.10x = 357,634,038,283.94
  5. Step 5: Solve for x
    x = 357,634,038,283.94/521,740.10
  6. Step 6: Final answer
    x = 685,463.97

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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.