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Finding the Fourth Proportional to 610,672.40, 916,008.60 and 421,715.60

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Solution

The fourth proportional to 610,672.40, 916,008.60 and 421,715.60 is: 632,573.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,672.40 : 916,008.60 = 421,715.60 : x
  2. Step 2: Convert to fraction form
    610,672.40/916,008.60 = 421,715.60/x
  3. Step 3: Cross multiply
    610,672.40x = 916,008.60 × 421,715.60
  4. Step 4: Simplify right side
    610,672.40x = 386,295,116,354.16
  5. Step 5: Solve for x
    x = 386,295,116,354.16/610,672.40
  6. Step 6: Final answer
    x = 632,573.40

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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.