Home / 679,980.60-1,019,970.90-561,785.40

Finding the Fourth Proportional to 679,980.60, 1,019,970.90 and 561,785.40

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Solution

The fourth proportional to 679,980.60, 1,019,970.90 and 561,785.40 is: 842,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,980.60 : 1,019,970.90 = 561,785.40 : x
  2. Step 2: Convert to fraction form
    679,980.60/1,019,970.90 = 561,785.40/x
  3. Step 3: Cross multiply
    679,980.60x = 1,019,970.90 × 561,785.40
  4. Step 4: Simplify right side
    679,980.60x = 573,004,760,044.86
  5. Step 5: Solve for x
    x = 573,004,760,044.86/679,980.60
  6. Step 6: Final answer
    x = 842,678.10

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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.