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Finding the Fourth Proportional to 679,284.90, 937,420.42 and 369,187.47

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Solution

The fourth proportional to 679,284.90, 937,420.42 and 369,187.47 is: 509,482.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,284.90 : 937,420.42 = 369,187.47 : x
  2. Step 2: Convert to fraction form
    679,284.90/937,420.42 = 369,187.47/x
  3. Step 3: Cross multiply
    679,284.90x = 937,420.42 × 369,187.47
  4. Step 4: Simplify right side
    679,284.90x = 346,083,871,917.06
  5. Step 5: Solve for x
    x = 346,083,871,917.06/679,284.90
  6. Step 6: Final answer
    x = 509,482.65

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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.