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Finding the Fourth Proportional to 619,442.85, 928,967.44 and 421,038.21

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Solution

The fourth proportional to 619,442.85, 928,967.44 and 421,038.21 is: 631,423.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,442.85 : 928,967.44 = 421,038.21 : x
  2. Step 2: Convert to fraction form
    619,442.85/928,967.44 = 421,038.21/x
  3. Step 3: Cross multiply
    619,442.85x = 928,967.44 × 421,038.21
  4. Step 4: Simplify right side
    619,442.85x = 391,130,788,085.88
  5. Step 5: Solve for x
    x = 391,130,788,085.88/619,442.85
  6. Step 6: Final answer
    x = 631,423.53

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1.5x scale

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.