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Finding the Fourth Proportional to 612,294.60, 918,223.20 and 212,948.40

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Solution

The fourth proportional to 612,294.60, 918,223.20 and 212,948.40 is: 319,346.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,294.60 : 918,223.20 = 212,948.40 : x
  2. Step 2: Convert to fraction form
    612,294.60/918,223.20 = 212,948.40/x
  3. Step 3: Cross multiply
    612,294.60x = 918,223.20 × 212,948.40
  4. Step 4: Simplify right side
    612,294.60x = 195,534,161,282.88
  5. Step 5: Solve for x
    x = 195,534,161,282.88/612,294.60
  6. Step 6: Final answer
    x = 319,346.54

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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.