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Finding the Fourth Proportional to 587,763.40, 879,801.90 and 421,875.40

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Solution

The fourth proportional to 587,763.40, 879,801.90 and 421,875.40 is: 631,490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,763.40 : 879,801.90 = 421,875.40 : x
  2. Step 2: Convert to fraction form
    587,763.40/879,801.90 = 421,875.40/x
  3. Step 3: Cross multiply
    587,763.40x = 879,801.90 × 421,875.40
  4. Step 4: Simplify right side
    587,763.40x = 371,166,778,483.26
  5. Step 5: Solve for x
    x = 371,166,778,483.26/587,763.40
  6. Step 6: Final answer
    x = 631,490.12

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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.