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Finding the Fourth Proportional to 679,808.40, 1,020,004.20 and 347,384.40

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Solution

The fourth proportional to 679,808.40, 1,020,004.20 and 347,384.40 is: 521,225.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,808.40 : 1,020,004.20 = 347,384.40 : x
  2. Step 2: Convert to fraction form
    679,808.40/1,020,004.20 = 347,384.40/x
  3. Step 3: Cross multiply
    679,808.40x = 1,020,004.20 × 347,384.40
  4. Step 4: Simplify right side
    679,808.40x = 354,333,547,014.48
  5. Step 5: Solve for x
    x = 354,333,547,014.48/679,808.40
  6. Step 6: Final answer
    x = 521,225.61

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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.