Home / 989,139.60-1,483,709.40-918,280.80

Finding the Fourth Proportional to 989,139.60, 1,483,709.40 and 918,280.80

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Solution

The fourth proportional to 989,139.60, 1,483,709.40 and 918,280.80 is: 1,377,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,139.60 : 1,483,709.40 = 918,280.80 : x
  2. Step 2: Convert to fraction form
    989,139.60/1,483,709.40 = 918,280.80/x
  3. Step 3: Cross multiply
    989,139.60x = 1,483,709.40 × 918,280.80
  4. Step 4: Simplify right side
    989,139.60x = 1,362,461,854,799.52
  5. Step 5: Solve for x
    x = 1,362,461,854,799.52/989,139.60
  6. Step 6: Final answer
    x = 1,377,421.20

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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.