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Finding the Fourth Proportional to 612,036.40, 918,054.60 and 423,079.60

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Solution

The fourth proportional to 612,036.40, 918,054.60 and 423,079.60 is: 634,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,036.40 : 918,054.60 = 423,079.60 : x
  2. Step 2: Convert to fraction form
    612,036.40/918,054.60 = 423,079.60/x
  3. Step 3: Cross multiply
    612,036.40x = 918,054.60 × 423,079.60
  4. Step 4: Simplify right side
    612,036.40x = 388,410,172,946.16
  5. Step 5: Solve for x
    x = 388,410,172,946.16/612,036.40
  6. Step 6: Final answer
    x = 634,619.40

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Similar ratio
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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.