Home / 679,979.70-1,020,220.65-280,655.10

Finding the Fourth Proportional to 679,979.70, 1,020,220.65 and 280,655.10

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Solution

The fourth proportional to 679,979.70, 1,020,220.65 and 280,655.10 is: 421,086.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,979.70 : 1,020,220.65 = 280,655.10 : x
  2. Step 2: Convert to fraction form
    679,979.70/1,020,220.65 = 280,655.10/x
  3. Step 3: Cross multiply
    679,979.70x = 1,020,220.65 × 280,655.10
  4. Step 4: Simplify right side
    679,979.70x = 286,330,128,547.82
  5. Step 5: Solve for x
    x = 286,330,128,547.82/679,979.70
  6. Step 6: Final answer
    x = 421,086.29

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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.