Home / 989,867.80-1,484,510.10-390,629.80

Finding the Fourth Proportional to 989,867.80, 1,484,510.10 and 390,629.80

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Solution

The fourth proportional to 989,867.80, 1,484,510.10 and 390,629.80 is: 585,829.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,867.80 : 1,484,510.10 = 390,629.80 : x
  2. Step 2: Convert to fraction form
    989,867.80/1,484,510.10 = 390,629.80/x
  3. Step 3: Cross multiply
    989,867.80x = 1,484,510.10 × 390,629.80
  4. Step 4: Simplify right side
    989,867.80x = 579,893,883,460.98
  5. Step 5: Solve for x
    x = 579,893,883,460.98/989,867.80
  6. Step 6: Final answer
    x = 585,829.63

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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.