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Finding the Fourth Proportional to 670,343.40, 1,005,903.90 and 249,661.80

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Solution

The fourth proportional to 670,343.40, 1,005,903.90 and 249,661.80 is: 374,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,343.40 : 1,005,903.90 = 249,661.80 : x
  2. Step 2: Convert to fraction form
    670,343.40/1,005,903.90 = 249,661.80/x
  3. Step 3: Cross multiply
    670,343.40x = 1,005,903.90 × 249,661.80
  4. Step 4: Simplify right side
    670,343.40x = 251,135,778,301.02
  5. Step 5: Solve for x
    x = 251,135,778,301.02/670,343.40
  6. Step 6: Final answer
    x = 374,637.50

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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.