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Finding the Fourth Proportional to 612,070.40, 918,105.60 and 328,635.20

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Solution

The fourth proportional to 612,070.40, 918,105.60 and 328,635.20 is: 492,952.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,070.40 : 918,105.60 = 328,635.20 : x
  2. Step 2: Convert to fraction form
    612,070.40/918,105.60 = 328,635.20/x
  3. Step 3: Cross multiply
    612,070.40x = 918,105.60 × 328,635.20
  4. Step 4: Simplify right side
    612,070.40x = 301,721,817,477.12
  5. Step 5: Solve for x
    x = 301,721,817,477.12/612,070.40
  6. Step 6: Final answer
    x = 492,952.80

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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.