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Finding the Fourth Proportional to 660,189.35, 990,070.28 and 210,804.93

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Solution

The fourth proportional to 660,189.35, 990,070.28 and 210,804.93 is: 316,139.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,189.35 : 990,070.28 = 210,804.93 : x
  2. Step 2: Convert to fraction form
    660,189.35/990,070.28 = 210,804.93/x
  3. Step 3: Cross multiply
    660,189.35x = 990,070.28 × 210,804.93
  4. Step 4: Simplify right side
    660,189.35x = 208,711,695,510.54
  5. Step 5: Solve for x
    x = 208,711,695,510.54/660,189.35
  6. Step 6: Final answer
    x = 316,139.14

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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.