Home / 987,089.40-1,480,979.70-426,526.20

Finding the Fourth Proportional to 987,089.40, 1,480,979.70 and 426,526.20

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Solution

The fourth proportional to 987,089.40, 1,480,979.70 and 426,526.20 is: 639,938.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,089.40 : 1,480,979.70 = 426,526.20 : x
  2. Step 2: Convert to fraction form
    987,089.40/1,480,979.70 = 426,526.20/x
  3. Step 3: Cross multiply
    987,089.40x = 1,480,979.70 × 426,526.20
  4. Step 4: Simplify right side
    987,089.40x = 631,676,643,718.14
  5. Step 5: Solve for x
    x = 631,676,643,718.14/987,089.40
  6. Step 6: Final answer
    x = 639,938.64

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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.