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Finding the Fourth Proportional to 660,066.70, 989,905.65 and 260,574.70

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Solution

The fourth proportional to 660,066.70, 989,905.65 and 260,574.70 is: 390,785.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,066.70 : 989,905.65 = 260,574.70 : x
  2. Step 2: Convert to fraction form
    660,066.70/989,905.65 = 260,574.70/x
  3. Step 3: Cross multiply
    660,066.70x = 989,905.65 × 260,574.70
  4. Step 4: Simplify right side
    660,066.70x = 257,944,367,777.06
  5. Step 5: Solve for x
    x = 257,944,367,777.06/660,066.70
  6. Step 6: Final answer
    x = 390,785.31

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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.