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Finding the Fourth Proportional to 660,005.51, 910,807.98 and 358,199.51

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Solution

The fourth proportional to 660,005.51, 910,807.98 and 358,199.51 is: 494,315.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,005.51 : 910,807.98 = 358,199.51 : x
  2. Step 2: Convert to fraction form
    660,005.51/910,807.98 = 358,199.51/x
  3. Step 3: Cross multiply
    660,005.51x = 910,807.98 × 358,199.51
  4. Step 4: Simplify right side
    660,005.51x = 326,250,970,349.09
  5. Step 5: Solve for x
    x = 326,250,970,349.09/660,005.51
  6. Step 6: Final answer
    x = 494,315.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.