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Finding the Fourth Proportional to 612,225.90, 918,010.80 and 256,838.40

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Solution

The fourth proportional to 612,225.90, 918,010.80 and 256,838.40 is: 385,119.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,225.90 : 918,010.80 = 256,838.40 : x
  2. Step 2: Convert to fraction form
    612,225.90/918,010.80 = 256,838.40/x
  3. Step 3: Cross multiply
    612,225.90x = 918,010.80 × 256,838.40
  4. Step 4: Simplify right side
    612,225.90x = 235,780,425,054.72
  5. Step 5: Solve for x
    x = 235,780,425,054.72/612,225.90
  6. Step 6: Final answer
    x = 385,119.98

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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.